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industrial-network-security-guide.md
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industrial-network-security-guide.md
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security-assessment-checklist.sh
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security-assessment-checklist.sh
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#!/bin/bash
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#========================================
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# Industrial Network Security Assessment Tool
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# Based on IEC 62443 Standards
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#========================================
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# Colors
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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echo ""
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echo "========================================"
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echo "Industrial Network Security Assessment"
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echo "Based on IEC 62443 Standards"
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echo "========================================"
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echo ""
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# Initialize counters
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TOTAL_CHECKS=0
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PASSED=0
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FAILED=0
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WARNING=0
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NA=0
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# Function to check and record result
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check_item() {
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local category=$1
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local question=$2
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local requirement=$3
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echo ""
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echo -e "${BLUE}[$category]${NC} $question"
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echo "Requirement: $requirement"
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echo ""
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echo "Status:"
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echo " 1) Pass (✓)"
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echo " 2) Fail (✗)"
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echo " 3) Warning (⚠)"
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echo " 4) N/A"
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read -p "Enter choice [1-4]: " choice
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TOTAL_CHECKS=$((TOTAL_CHECKS + 1))
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case $choice in
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1)
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echo -e "${GREEN}✓ PASS${NC}"
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PASSED=$((PASSED + 1))
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;;
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2)
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echo -e "${RED}✗ FAIL${NC}"
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FAILED=$((FAILED + 1))
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read -p "Enter finding/notes: " notes
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echo "FAIL,$category,$question,$notes" >> assessment_findings.csv
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;;
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3)
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echo -e "${YELLOW}⚠ WARNING${NC}"
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WARNING=$((WARNING + 1))
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read -p "Enter finding/notes: " notes
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echo "WARNING,$category,$question,$notes" >> assessment_findings.csv
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;;
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4)
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echo "N/A"
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NA=$((NA + 1))
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;;
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*)
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echo "Invalid choice, marking as FAIL"
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FAILED=$((FAILED + 1))
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;;
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esac
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}
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# Initialize findings file
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echo "Severity,Category,Item,Notes" > assessment_findings.csv
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echo ""
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echo "========================================"
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echo "SECTION 1: ASSET INVENTORY"
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echo "========================================"
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check_item "Asset Inventory" \
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"Are all PLCs documented with model, firmware version, and location?" \
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"Complete inventory of all control system components per IEC 62443-2-1"
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check_item "Asset Inventory" \
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"Is network topology documented with current diagrams?" \
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"Network architecture diagrams showing all zones and conduits"
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check_item "Asset Inventory" \
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"Are all communication paths documented?" \
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"Data flow diagrams showing all network connections"
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check_item "Asset Inventory" \
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"Are software versions documented for all SCADA/HMI systems?" \
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"Complete software inventory with versions"
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echo ""
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echo "========================================"
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echo "SECTION 2: ACCESS CONTROL"
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echo "========================================"
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check_item "Access Control" \
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"Do all PLCs have password protection enabled?" \
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"IEC 62443-3-3 SR 1.1: Password protection on all devices"
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check_item "Access Control" \
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"Are passwords at least 8 characters with complexity requirements?" \
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"IEC 62443-3-3 SR 1.5: Strong password policy"
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check_item "Access Control" \
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"Are IP Access Control Lists configured on PLCs?" \
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"IEC 62443-3-3 SR 1.13: Access control based on IP address"
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check_item "Access Control" \
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"Is multi-factor authentication (MFA) used for remote access?" \
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"IEC 62443-3-3 SR 1.2: Multi-factor authentication for remote access"
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check_item "Access Control" \
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"Are user accounts reviewed quarterly?" \
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"IEC 62443-2-1: Regular access reviews and recertification"
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check_item "Access Control" \
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"Are default passwords changed on all devices?" \
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"IEC 62443-4-2 CR 1.1: No default credentials"
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check_item "Access Control" \
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"Is role-based access control (RBAC) implemented?" \
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"IEC 62443-3-3 SR 1.3: Least privilege principle"
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echo ""
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echo "========================================"
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echo "SECTION 3: NETWORK SEGMENTATION"
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echo "========================================"
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check_item "Network Segmentation" \
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"Are control networks physically or logically separated from corporate networks?" \
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"IEC 62443-3-2: Zones and conduits architecture"
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check_item "Network Segmentation" \
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"Are firewalls deployed between security zones?" \
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"IEC 62443-3-3 SR 3.1: Network segmentation with firewalls"
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check_item "Network Segmentation" \
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"Are firewall rules based on whitelist (deny by default)?" \
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"IEC 62443-3-3 SR 3.1: Default deny policy"
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check_item "Network Segmentation" \
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"Is a DMZ implemented between IT and OT networks?" \
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"Defense-in-depth: DMZ for data exchange"
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check_item "Network Segmentation" \
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"Are VLANs used for logical network separation?" \
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"IEC 62443-3-3 SR 3.1: Network segregation"
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check_item "Network Segmentation" \
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"Are critical safety systems air-gapped or on separate network?" \
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"IEC 62443-3-3 SR 3.1: Critical system isolation"
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echo ""
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echo "========================================"
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echo "SECTION 4: PLC SECURITY CONFIGURATION"
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echo "========================================"
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check_item "PLC Security" \
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"Are unused PLC services disabled (web server, FTP, SNMP)?" \
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"IEC 62443-3-3 SR 7.6: Minimize attack surface"
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check_item "PLC Security" \
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"Is PLC firmware up to date?" \
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"IEC 62443-4-1 SR 1.1: Security updates applied"
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check_item "PLC Security" \
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"Are PLC configuration changes logged?" \
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"IEC 62443-3-3 SR 2.9: Audit logging"
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check_item "PLC Security" \
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"Are PLCs configured to only accept connections from authorized IPs?" \
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"IEC 62443-4-2 CR 1.13: Source address validation"
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check_item "PLC Security" \
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"Is PLC front panel physically secured (S7-1500)?" \
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"IEC 62443-3-3 SR 1.11: Physical access control"
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check_item "PLC Security" \
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"Are PLC communication processors (CPs) using firewalls/VPN?" \
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"IEC 62443-3-3 SR 4.1: Encrypted communications"
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echo ""
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echo "========================================"
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echo "SECTION 5: SYSTEM HARDENING"
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echo "========================================"
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check_item "System Hardening" \
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"Are operating systems hardened per vendor guidance?" \
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"IEC 62443-4-2 CR 7.6: Operating system hardening"
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check_item "System Hardening" \
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"Is antivirus/endpoint protection deployed on HMI/SCADA systems?" \
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"IEC 62443-3-3 SR 3.2: Malware protection"
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check_item "System Hardening" \
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"Is application whitelisting implemented?" \
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"NIST SP 800-82: Application control"
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check_item "System Hardening" \
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"Are USB ports disabled or controlled on operator stations?" \
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"IEC 62443-3-3 SR 3.2: Removable media control"
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check_item "System Hardening" \
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"Are security patches applied in timely manner?" \
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"IEC 62443-2-1: Patch management process"
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check_item "System Hardening" \
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"Are unnecessary Windows services disabled?" \
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"Defense-in-depth: Minimize attack surface"
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echo ""
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echo "========================================"
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echo "SECTION 6: MONITORING AND LOGGING"
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echo "========================================"
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check_item "Monitoring" \
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"Is network traffic monitored with IDS/IPS?" \
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"IEC 62443-3-3 SR 6.1: Network monitoring"
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check_item "Monitoring" \
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"Are logs centrally collected (SIEM)?" \
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"IEC 62443-3-3 SR 2.8: Centralized logging"
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check_item "Monitoring" \
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"Are critical events alerting in real-time?" \
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"IEC 62443-3-3 SR 2.9: Security event alerting"
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check_item "Monitoring" \
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"Are logs retained for at least 90 days?" \
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"IEC 62443-2-1: Audit log retention"
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check_item "Monitoring" \
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"Are logs reviewed regularly?" \
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"IEC 62443-2-1: Log review procedures"
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check_item "Monitoring" \
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"Is network baseline established and anomalies detected?" \
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"IEC 62443-4-2 CR 3.3: Anomaly detection"
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echo ""
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echo "========================================"
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echo "SECTION 7: REMOTE ACCESS"
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echo "========================================"
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check_item "Remote Access" \
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"Is VPN required for all remote access?" \
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"IEC 62443-3-3 SR 4.1: Encrypted remote access"
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check_item "Remote Access" \
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"Is MFA required for VPN access?" \
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"IEC 62443-3-3 SR 1.2: Multi-factor authentication"
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check_item "Remote Access" \
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"Are vendor remote access sessions monitored and time-limited?" \
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"CISA: Vendor remote access controls"
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check_item "Remote Access" \
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"Is remote access logged and reviewed?" \
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"IEC 62443-3-3 SR 2.9: Remote access auditing"
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check_item "Remote Access" \
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"Are jump servers/bastion hosts used for remote access?" \
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"Defense-in-depth: Controlled access points"
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echo ""
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echo "========================================"
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echo "SECTION 8: PHYSICAL SECURITY"
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echo "========================================"
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check_item "Physical Security" \
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"Are control rooms and server rooms physically secured?" \
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"IEC 62443-3-3 SR 1.11: Physical access control"
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check_item "Physical Security" \
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"Is access to control rooms logged (badge system)?" \
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"IEC 62443-3-3 SR 1.11: Physical access auditing"
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check_item "Physical Security" \
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"Are network cabinets locked?" \
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"IEC 62443-3-3 SR 1.11: Equipment physical protection"
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check_item "Physical Security" \
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"Is CCTV monitoring implemented for critical areas?" \
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"Defense-in-depth: Video surveillance"
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check_item "Physical Security" \
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"Are visitor access procedures documented and followed?" \
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"IEC 62443-2-1: Visitor management"
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echo ""
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echo "========================================"
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echo "SECTION 9: BACKUP AND RECOVERY"
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echo "========================================"
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check_item "Backup/Recovery" \
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"Are PLC programs backed up after every change?" \
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"IEC 62443-2-1: Configuration management"
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check_item "Backup/Recovery" \
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"Are backups stored offline or off-site?" \
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"Defense-in-depth: 3-2-1 backup rule"
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check_item "Backup/Recovery" \
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"Are backup integrity checks performed?" \
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"IEC 62443-3-3 SR 7.3: Backup verification"
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check_item "Backup/Recovery" \
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||||
"Is recovery tested at least quarterly?" \
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"IEC 62443-2-1: Disaster recovery testing"
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|
||||
check_item "Backup/Recovery" \
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"Are Recovery Time Objectives (RTO) documented?" \
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"Business continuity planning"
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|
||||
echo ""
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||||
echo "========================================"
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echo "SECTION 10: INCIDENT RESPONSE"
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echo "========================================"
|
||||
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check_item "Incident Response" \
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"Is an incident response plan documented?" \
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"IEC 62443-2-1: Incident management"
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||||
|
||||
check_item "Incident Response" \
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"Is incident response team identified with roles assigned?" \
|
||||
"IEC 62443-2-1: IR team structure"
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||||
|
||||
check_item "Incident Response" \
|
||||
"Are incident response procedures tested annually?" \
|
||||
"IEC 62443-2-1: Tabletop exercises"
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||||
|
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check_item "Incident Response" \
|
||||
"Are incidents documented and lessons learned captured?" \
|
||||
"IEC 62443-2-1: Continuous improvement"
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||||
|
||||
check_item "Incident Response" \
|
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"Is there a communication plan for incidents?" \
|
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"IEC 62443-2-1: Stakeholder communication"
|
||||
|
||||
echo ""
|
||||
echo "========================================"
|
||||
echo "SECTION 11: POLICIES AND PROCEDURES"
|
||||
echo "========================================"
|
||||
|
||||
check_item "Policies" \
|
||||
"Is a cybersecurity policy documented and approved?" \
|
||||
"IEC 62443-2-1: Cybersecurity policy"
|
||||
|
||||
check_item "Policies" \
|
||||
"Are change management procedures documented and followed?" \
|
||||
"IEC 62443-2-1: Change control"
|
||||
|
||||
check_item "Policies" \
|
||||
"Is patch management process documented?" \
|
||||
"IEC 62443-2-1: Security update management"
|
||||
|
||||
check_item "Policies" \
|
||||
"Are security roles and responsibilities documented?" \
|
||||
"IEC 62443-2-1: Governance structure"
|
||||
|
||||
check_item "Policies" \
|
||||
"Is security awareness training conducted annually?" \
|
||||
"IEC 62443-2-1: Personnel security awareness"
|
||||
|
||||
echo ""
|
||||
echo "========================================"
|
||||
echo "SECTION 12: RISK MANAGEMENT"
|
||||
echo "========================================"
|
||||
|
||||
check_item "Risk Management" \
|
||||
"Has a security risk assessment been conducted?" \
|
||||
"IEC 62443-3-2: Security risk assessment"
|
||||
|
||||
check_item "Risk Management" \
|
||||
"Are risk assessment results documented?" \
|
||||
"IEC 62443-3-2: Risk documentation"
|
||||
|
||||
check_item "Risk Management" \
|
||||
"Are target security levels (SL-T) defined for each zone?" \
|
||||
"IEC 62443-3-2: Security level targets"
|
||||
|
||||
check_item "Risk Management" \
|
||||
"Is risk assessment updated annually or after major changes?" \
|
||||
"IEC 62443-2-1: Risk assessment review"
|
||||
|
||||
check_item "Risk Management" \
|
||||
"Are residual risks accepted by management?" \
|
||||
"IEC 62443-2-1: Risk acceptance"
|
||||
|
||||
#========================================
|
||||
# Generate Report
|
||||
#========================================
|
||||
|
||||
echo ""
|
||||
echo "========================================"
|
||||
echo "ASSESSMENT COMPLETE"
|
||||
echo "========================================"
|
||||
echo ""
|
||||
|
||||
# Calculate percentages
|
||||
COMPLIANCE_ITEMS=$((TOTAL_CHECKS - NA))
|
||||
if [ $COMPLIANCE_ITEMS -gt 0 ]; then
|
||||
COMPLIANCE_PCT=$((PASSED * 100 / COMPLIANCE_ITEMS))
|
||||
else
|
||||
COMPLIANCE_PCT=0
|
||||
fi
|
||||
|
||||
echo "Assessment Summary:"
|
||||
echo "-------------------"
|
||||
echo "Total Checks: $TOTAL_CHECKS"
|
||||
echo "Passed: $PASSED"
|
||||
echo "Failed: $FAILED"
|
||||
echo "Warnings: $WARNING"
|
||||
echo "Not Applicable: $NA"
|
||||
echo ""
|
||||
echo "Compliance Rate: $COMPLIANCE_PCT% (excluding N/A)"
|
||||
echo ""
|
||||
|
||||
# Risk Rating
|
||||
if [ $COMPLIANCE_PCT -ge 90 ]; then
|
||||
RISK_LEVEL="${GREEN}LOW RISK${NC}"
|
||||
elif [ $COMPLIANCE_PCT -ge 70 ]; then
|
||||
RISK_LEVEL="${YELLOW}MEDIUM RISK${NC}"
|
||||
elif [ $COMPLIANCE_PCT -ge 50 ]; then
|
||||
RISK_LEVEL="${YELLOW}HIGH RISK${NC}"
|
||||
else
|
||||
RISK_LEVEL="${RED}CRITICAL RISK${NC}"
|
||||
fi
|
||||
|
||||
echo -e "Overall Risk Level: $RISK_LEVEL"
|
||||
echo ""
|
||||
|
||||
# Save summary to file
|
||||
cat > assessment_summary.txt <<EOF
|
||||
INDUSTRIAL NETWORK SECURITY ASSESSMENT SUMMARY
|
||||
==============================================
|
||||
|
||||
Date: $(date)
|
||||
Assessor: $USER
|
||||
|
||||
RESULTS:
|
||||
--------
|
||||
Total Checks: $TOTAL_CHECKS
|
||||
Passed: $PASSED (${GREEN}✓${NC})
|
||||
Failed: $FAILED (${RED}✗${NC})
|
||||
Warnings: $WARNING (${YELLOW}⚠${NC})
|
||||
Not Applicable: $NA
|
||||
|
||||
Compliance Rate: $COMPLIANCE_PCT%
|
||||
Overall Risk: $RISK_LEVEL
|
||||
|
||||
FINDINGS:
|
||||
---------
|
||||
See assessment_findings.csv for detailed findings.
|
||||
|
||||
RECOMMENDATIONS:
|
||||
----------------
|
||||
EOF
|
||||
|
||||
if [ $FAILED -gt 0 ]; then
|
||||
echo "1. Address all FAILED items immediately (Critical Priority)" >> assessment_summary.txt
|
||||
fi
|
||||
|
||||
if [ $WARNING -gt 0 ]; then
|
||||
echo "2. Review and remediate WARNING items (High Priority)" >> assessment_summary.txt
|
||||
fi
|
||||
|
||||
if [ $COMPLIANCE_PCT -lt 90 ]; then
|
||||
echo "3. Develop remediation plan to achieve 90%+ compliance" >> assessment_summary.txt
|
||||
fi
|
||||
|
||||
echo "4. Schedule next assessment in 6 months" >> assessment_summary.txt
|
||||
echo "" >> assessment_summary.txt
|
||||
|
||||
echo "Files Generated:"
|
||||
echo "----------------"
|
||||
echo "1. assessment_findings.csv - Detailed findings list"
|
||||
echo "2. assessment_summary.txt - Summary report"
|
||||
echo ""
|
||||
|
||||
# Show top findings
|
||||
if [ -f assessment_findings.csv ]; then
|
||||
echo "Top Findings:"
|
||||
echo "-------------"
|
||||
grep "^FAIL" assessment_findings.csv | head -5
|
||||
echo ""
|
||||
grep "^WARNING" assessment_findings.csv | head -3
|
||||
echo ""
|
||||
fi
|
||||
|
||||
echo "========================================"
|
||||
echo "Next Steps:"
|
||||
echo "========================================"
|
||||
echo "1. Review findings in assessment_findings.csv"
|
||||
echo "2. Prioritize remediation actions"
|
||||
echo "3. Create remediation plan with timeline"
|
||||
echo "4. Assign owners to each finding"
|
||||
echo "5. Track progress and re-assess"
|
||||
echo ""
|
||||
echo "For detailed guidance, see:"
|
||||
echo " - industrial-network-security-guide.md"
|
||||
echo " - IEC 62443 standards documentation"
|
||||
echo ""
|
||||
722
security-implementation-roadmap.md
Normal file
722
security-implementation-roadmap.md
Normal file
|
|
@ -0,0 +1,722 @@
|
|||
# Industrial Network Security Implementation Roadmap
|
||||
## 90-Day Quick Start Guide
|
||||
|
||||
This document provides a practical, step-by-step roadmap for implementing industrial network security in 90 days.
|
||||
|
||||
---
|
||||
|
||||
## Overview
|
||||
|
||||
This roadmap is designed for organizations that need to implement basic industrial cybersecurity quickly while working toward full IEC 62443 compliance.
|
||||
|
||||
**Timeline**: 90 days (can be adjusted based on resources)
|
||||
**Goal**: Achieve 70-80% compliance with critical security controls
|
||||
**Based On**: IEC 62443, NIST SP 800-82, CISA Guidelines
|
||||
|
||||
---
|
||||
|
||||
## Week 1-2: Quick Assessment
|
||||
|
||||
### Day 1-3: Inventory and Discovery
|
||||
```
|
||||
✓ List all PLCs (model, IP, firmware, location)
|
||||
✓ Create basic network diagram
|
||||
✓ Document who has access (local and remote)
|
||||
✓ List all HMI/SCADA systems
|
||||
✓ Identify critical production systems
|
||||
```
|
||||
|
||||
**Deliverable**: Asset inventory spreadsheet + network diagram
|
||||
|
||||
### Day 4-7: Quick Risk Assessment
|
||||
```
|
||||
✓ Identify top 5 critical assets
|
||||
✓ Rate each asset: Impact (1-5), Likelihood (1-5)
|
||||
✓ Calculate risk scores
|
||||
✓ Prioritize based on risk score
|
||||
```
|
||||
|
||||
**Risk Matrix Template:**
|
||||
| Asset | Impact | Likelihood | Risk Score | Priority |
|
||||
|-------|--------|-----------|-----------|----------|
|
||||
| PLC-REACTOR-01 | 5 (Safety) | 4 | 20 | P1 |
|
||||
| HMI-CONTROL-01 | 4 | 3 | 12 | P2 |
|
||||
|
||||
### Day 8-10: Gap Analysis
|
||||
```
|
||||
✓ Check current security controls
|
||||
✓ Compare against critical requirements
|
||||
✓ Create quick-win list (no downtime needed)
|
||||
```
|
||||
|
||||
**Critical Requirements Checklist:**
|
||||
- [ ] PLC password protection
|
||||
- [ ] IP access control
|
||||
- [ ] Firewall between IT/OT
|
||||
- [ ] Remote access controls
|
||||
- [ ] Backup procedures
|
||||
- [ ] Logging enabled
|
||||
|
||||
---
|
||||
|
||||
## Week 3-4: Quick Wins (No Downtime)
|
||||
|
||||
### Tasks That Can Be Done Immediately
|
||||
|
||||
#### 1. Enable PLC Password Protection
|
||||
```
|
||||
Time: 15 minutes per PLC
|
||||
Risk: None
|
||||
Impact: HIGH
|
||||
|
||||
Steps:
|
||||
1. Open TIA Portal
|
||||
2. PLC Properties → Protection
|
||||
3. Set "Read/Write Protection"
|
||||
4. Create strong password (min 8 chars)
|
||||
5. Document in password vault
|
||||
6. Download to PLC
|
||||
```
|
||||
|
||||
**Password Requirements:**
|
||||
- Minimum 8 characters
|
||||
- Mix of uppercase, lowercase, numbers
|
||||
- Store in secure password manager
|
||||
- Change every 90 days
|
||||
|
||||
#### 2. Configure IP Access Control Lists
|
||||
```
|
||||
Time: 10 minutes per PLC
|
||||
Risk: None (tested before applying)
|
||||
Impact: HIGH
|
||||
|
||||
Steps:
|
||||
1. List authorized IPs (HMI, Engineering station)
|
||||
2. PLC Properties → Connection mechanisms
|
||||
3. Enable "Permit access only for..."
|
||||
4. Add authorized IPs
|
||||
5. Test from authorized station
|
||||
6. Download to PLC
|
||||
```
|
||||
|
||||
**Example ACL:**
|
||||
```
|
||||
Allowed IPs:
|
||||
- 192.168.10.50 (Engineering Station)
|
||||
- 192.168.10.60 (HMI-01)
|
||||
- 192.168.10.70 (SCADA Server)
|
||||
```
|
||||
|
||||
#### 3. Disable Unused PLC Services
|
||||
```
|
||||
Time: 5 minutes per PLC
|
||||
Risk: Low (test first)
|
||||
Impact: MEDIUM
|
||||
|
||||
Disable if not needed:
|
||||
- [ ] Web Server (HTTP/HTTPS)
|
||||
- [ ] FTP Server
|
||||
- [ ] SNMP
|
||||
- [ ] Modbus TCP
|
||||
```
|
||||
|
||||
#### 4. Change Default Passwords
|
||||
```
|
||||
Time: Varies
|
||||
Risk: None
|
||||
Impact: HIGH
|
||||
|
||||
Change passwords on:
|
||||
- [ ] HMI systems
|
||||
- [ ] SCADA servers
|
||||
- [ ] Network switches
|
||||
- [ ] Firewalls
|
||||
- [ ] Routers
|
||||
```
|
||||
|
||||
#### 5. Enable Logging
|
||||
```
|
||||
Time: 30 minutes
|
||||
Risk: None
|
||||
Impact: MEDIUM
|
||||
|
||||
Enable logs on:
|
||||
- [ ] PLCs (if supported)
|
||||
- [ ] Firewalls
|
||||
- [ ] Switches
|
||||
- [ ] HMI/SCADA systems
|
||||
- [ ] Engineering stations
|
||||
```
|
||||
|
||||
#### 6. Create Baseline Backups
|
||||
```
|
||||
Time: 1 hour
|
||||
Risk: None
|
||||
Impact: HIGH
|
||||
|
||||
Backup:
|
||||
- [ ] All PLC programs
|
||||
- [ ] HMI projects
|
||||
- [ ] SCADA configurations
|
||||
- [ ] Network device configs
|
||||
- Store in 3 locations (network, external drive, off-site)
|
||||
```
|
||||
|
||||
**End of Week 4 Status Check:**
|
||||
- [ ] All PLCs have passwords
|
||||
- [ ] IP ACLs configured
|
||||
- [ ] Unused services disabled
|
||||
- [ ] Default passwords changed
|
||||
- [ ] Logging enabled
|
||||
- [ ] Backups created
|
||||
|
||||
**Expected Compliance: ~40%**
|
||||
|
||||
---
|
||||
|
||||
## Week 5-6: Basic Network Security
|
||||
|
||||
### Task 1: Install Firewall Between IT and OT
|
||||
```
|
||||
Time: 2-4 hours (includes planning)
|
||||
Risk: Medium (requires downtime)
|
||||
Impact: CRITICAL
|
||||
|
||||
Steps:
|
||||
1. Purchase industrial firewall (or use existing)
|
||||
2. Design firewall rules (whitelist only)
|
||||
3. Schedule maintenance window
|
||||
4. Install firewall
|
||||
5. Configure and test rules
|
||||
6. Document configuration
|
||||
```
|
||||
|
||||
**Basic Firewall Rules:**
|
||||
```
|
||||
ALLOW:
|
||||
- SCADA → PLCs (port 102, S7 protocol)
|
||||
- HMI → PLCs (port 102)
|
||||
- Engineering Station → PLCs (port 102)
|
||||
- Historian → PLCs (read-only)
|
||||
|
||||
DENY:
|
||||
- All other traffic
|
||||
```
|
||||
|
||||
### Task 2: Segment Network with VLANs
|
||||
```
|
||||
Time: 4-8 hours
|
||||
Risk: Medium (test thoroughly)
|
||||
Impact: HIGH
|
||||
|
||||
VLAN Structure:
|
||||
- VLAN 10: Control Network (PLCs)
|
||||
- VLAN 20: Supervisory (SCADA/HMI)
|
||||
- VLAN 30: Engineering
|
||||
- VLAN 40: DMZ (Historian)
|
||||
```
|
||||
|
||||
### Task 3: Secure Remote Access
|
||||
```
|
||||
Time: 4 hours
|
||||
Risk: Low
|
||||
Impact: HIGH
|
||||
|
||||
Implementation:
|
||||
1. Set up VPN server
|
||||
2. Configure VPN client access
|
||||
3. Require strong authentication
|
||||
4. Implement VPN logging
|
||||
5. Document procedures
|
||||
```
|
||||
|
||||
**Remote Access Requirements:**
|
||||
- VPN required for all external access
|
||||
- Strong passwords (12+ characters)
|
||||
- MFA if possible
|
||||
- Session timeout: 4 hours
|
||||
- All sessions logged
|
||||
|
||||
**End of Week 6 Status Check:**
|
||||
- [ ] Firewall installed and configured
|
||||
- [ ] VLANs implemented
|
||||
- [ ] VPN for remote access
|
||||
- [ ] Firewall rules documented
|
||||
|
||||
**Expected Compliance: ~55%**
|
||||
|
||||
---
|
||||
|
||||
## Week 7-8: System Hardening
|
||||
|
||||
### Task 1: Harden Windows Systems
|
||||
```
|
||||
Time: 2 hours per system
|
||||
Risk: Low
|
||||
Impact: MEDIUM
|
||||
|
||||
Apply to: HMI, SCADA, Engineering Stations
|
||||
|
||||
Hardening Steps:
|
||||
1. Install latest Windows updates
|
||||
2. Enable Windows Firewall
|
||||
3. Disable unnecessary services
|
||||
4. Remove unused software
|
||||
5. Configure User Account Control (UAC)
|
||||
6. Enable BitLocker encryption (if available)
|
||||
```
|
||||
|
||||
**Windows Hardening Checklist:**
|
||||
- [ ] Windows Firewall: Enabled
|
||||
- [ ] Windows Update: Enabled (with control)
|
||||
- [ ] SMBv1: Disabled
|
||||
- [ ] RDP: Disabled (unless needed)
|
||||
- [ ] Guest account: Disabled
|
||||
- [ ] Autorun: Disabled
|
||||
- [ ] Screen lock: 15 minutes
|
||||
|
||||
### Task 2: Deploy Antivirus
|
||||
```
|
||||
Time: 1 hour per system
|
||||
Risk: Medium (test for false positives)
|
||||
Impact: MEDIUM
|
||||
|
||||
Steps:
|
||||
1. Choose industrial-friendly AV
|
||||
2. Test in non-production first
|
||||
3. Configure exclusions for control apps
|
||||
4. Deploy to all Windows systems
|
||||
5. Enable centralized management
|
||||
```
|
||||
|
||||
**Important**: Some AV can interfere with real-time control systems. Test thoroughly!
|
||||
|
||||
### Task 3: USB Device Control
|
||||
```
|
||||
Time: 2 hours total
|
||||
Risk: Low
|
||||
Impact: MEDIUM
|
||||
|
||||
Options:
|
||||
A) Group Policy: Disable USB storage
|
||||
B) Third-party tool: Whitelist approved USB devices
|
||||
C) Physical: USB port locks
|
||||
```
|
||||
|
||||
**End of Week 8 Status Check:**
|
||||
- [ ] All Windows systems hardened
|
||||
- [ ] Antivirus deployed
|
||||
- [ ] USB controls implemented
|
||||
|
||||
**Expected Compliance: ~65%**
|
||||
|
||||
---
|
||||
|
||||
## Week 9-10: Monitoring and Documentation
|
||||
|
||||
### Task 1: Set Up Basic Monitoring
|
||||
```
|
||||
Time: 8 hours
|
||||
Risk: Low
|
||||
Impact: HIGH
|
||||
|
||||
Implement:
|
||||
1. Centralized log collection (syslog server)
|
||||
2. Basic SIEM or log analysis tool
|
||||
3. Critical alerts (email/SMS)
|
||||
```
|
||||
|
||||
**Minimum Alerts:**
|
||||
- PLC program download
|
||||
- PLC mode change (RUN/STOP)
|
||||
- Failed login attempts (5 within 1 hour)
|
||||
- Firewall rule violations
|
||||
- Antivirus detections
|
||||
|
||||
### Task 2: Document Everything
|
||||
```
|
||||
Time: 4-8 hours
|
||||
Risk: None
|
||||
Impact: MEDIUM
|
||||
|
||||
Create documentation:
|
||||
1. Network architecture diagram (updated)
|
||||
2. Asset inventory (complete)
|
||||
3. Security configuration baselines
|
||||
4. Access control matrix (who has access to what)
|
||||
5. Incident response procedures (basic)
|
||||
6. Backup and recovery procedures
|
||||
```
|
||||
|
||||
**Document Templates in Appendix**
|
||||
|
||||
**End of Week 10 Status Check:**
|
||||
- [ ] Log collection working
|
||||
- [ ] Critical alerts configured
|
||||
- [ ] Documentation complete
|
||||
|
||||
**Expected Compliance: ~70%**
|
||||
|
||||
---
|
||||
|
||||
## Week 11-12: Policies and Training
|
||||
|
||||
### Task 1: Create Security Policies
|
||||
```
|
||||
Time: 8-16 hours
|
||||
Risk: None
|
||||
Impact: MEDIUM
|
||||
|
||||
Minimum required policies:
|
||||
1. Cybersecurity Policy (overall)
|
||||
2. Access Control Policy
|
||||
3. Password Policy
|
||||
4. Remote Access Policy
|
||||
5. Change Management Policy
|
||||
6. Incident Response Policy
|
||||
```
|
||||
|
||||
**Policy Template Structure:**
|
||||
```
|
||||
1. Purpose
|
||||
2. Scope
|
||||
3. Responsibilities
|
||||
4. Requirements
|
||||
5. Procedures
|
||||
6. Exceptions
|
||||
7. Enforcement
|
||||
```
|
||||
|
||||
### Task 2: Conduct Security Awareness Training
|
||||
```
|
||||
Time: 2-4 hours
|
||||
Risk: None
|
||||
Impact: HIGH
|
||||
|
||||
Training topics:
|
||||
1. Why security matters in OT
|
||||
2. Password security
|
||||
3. Phishing awareness
|
||||
4. Physical security
|
||||
5. Incident reporting
|
||||
6. USB and removable media risks
|
||||
```
|
||||
|
||||
### Task 3: Create Incident Response Plan
|
||||
```
|
||||
Time: 4-8 hours
|
||||
Risk: None
|
||||
Impact: HIGH
|
||||
|
||||
Plan components:
|
||||
1. IR team contact list
|
||||
2. Incident classification
|
||||
3. Response procedures
|
||||
4. Communication plan
|
||||
5. Escalation matrix
|
||||
```
|
||||
|
||||
**End of Week 12 Status Check:**
|
||||
- [ ] Security policies documented
|
||||
- [ ] Staff training completed
|
||||
- [ ] Incident response plan ready
|
||||
|
||||
**Expected Compliance: ~75%**
|
||||
|
||||
---
|
||||
|
||||
## Post-90 Days: Continuous Improvement
|
||||
|
||||
### Immediate Next Steps (Days 91-180)
|
||||
|
||||
#### 1. Advanced Monitoring
|
||||
- Deploy IDS/IPS for OT networks
|
||||
- Implement behavior-based anomaly detection
|
||||
- Set up SIEM with custom use cases
|
||||
|
||||
#### 2. Advanced Access Control
|
||||
- Implement multi-factor authentication
|
||||
- Deploy privileged access management
|
||||
- Set up jump servers for remote access
|
||||
|
||||
#### 3. Compliance and Audit
|
||||
- Conduct formal security assessment
|
||||
- Address remaining gaps
|
||||
- Prepare for external audit
|
||||
|
||||
#### 4. Advanced Network Security
|
||||
- Implement data diodes for one-way communication
|
||||
- Deploy industrial firewalls at zone boundaries
|
||||
- Consider zero-trust architecture
|
||||
|
||||
### Long-Term Roadmap (6-12 months)
|
||||
|
||||
**Month 6:**
|
||||
- Full IEC 62443 gap assessment
|
||||
- Penetration testing (test environment)
|
||||
- Update all documentation
|
||||
|
||||
**Month 9:**
|
||||
- Achieve 90% compliance
|
||||
- ISASecure certification preparation
|
||||
- Advanced threat hunting capabilities
|
||||
|
||||
**Month 12:**
|
||||
- External security audit
|
||||
- Full IEC 62443 compliance
|
||||
- Mature security operations center (SOC)
|
||||
|
||||
---
|
||||
|
||||
## Budget Estimates
|
||||
|
||||
### Minimal Budget ($5K-$15K)
|
||||
- Basic firewall: $2K-$5K
|
||||
- VPN server/licenses: $1K-$3K
|
||||
- Syslog server (can be free)
|
||||
- Training (internal)
|
||||
- Documentation (internal time)
|
||||
|
||||
### Recommended Budget ($25K-$50K)
|
||||
- Industrial firewall: $10K-$20K
|
||||
- SIEM/Log management: $5K-$10K
|
||||
- Managed switch with VLANs: $3K-$5K
|
||||
- Antivirus licenses: $2K-$5K
|
||||
- Training (external): $3K-$5K
|
||||
- Consulting support: $2K-$5K
|
||||
|
||||
### Full Implementation ($100K+)
|
||||
- Industrial firewalls (multiple): $30K-$50K
|
||||
- IDS/IPS for OT: $20K-$40K
|
||||
- SIEM platform: $20K-$40K
|
||||
- Network upgrades: $10K-$20K
|
||||
- Professional services: $20K-$50K
|
||||
- Training and certification: $5K-$10K
|
||||
|
||||
---
|
||||
|
||||
## Success Metrics
|
||||
|
||||
### Week-by-Week Targets
|
||||
|
||||
| Week | Target | Compliance % |
|
||||
|------|--------|--------------|
|
||||
| 2 | Assessment complete | 0% |
|
||||
| 4 | Quick wins done | 40% |
|
||||
| 6 | Network security | 55% |
|
||||
| 8 | System hardening | 65% |
|
||||
| 10 | Monitoring active | 70% |
|
||||
| 12 | Policies and training | 75% |
|
||||
|
||||
### Key Performance Indicators (KPIs)
|
||||
|
||||
**Security Posture:**
|
||||
- % of PLCs with password protection
|
||||
- % of PLCs with IP ACLs
|
||||
- Number of security zones
|
||||
- Firewall rule compliance
|
||||
|
||||
**Operational:**
|
||||
- Mean time to detect (MTTD) incidents
|
||||
- Mean time to respond (MTTR) incidents
|
||||
- % of systems with current patches
|
||||
- Backup success rate
|
||||
|
||||
**Compliance:**
|
||||
- % of IEC 62443 requirements met
|
||||
- Number of open findings
|
||||
- Time to remediate findings
|
||||
- Training completion rate
|
||||
|
||||
---
|
||||
|
||||
## Common Pitfalls to Avoid
|
||||
|
||||
### 1. Not Testing in Lab First
|
||||
**Problem**: Changes break production
|
||||
**Solution**: Always test in non-production environment
|
||||
|
||||
### 2. Inadequate Communication
|
||||
**Problem**: Operations surprised by changes
|
||||
**Solution**: Involve ops team from day 1
|
||||
|
||||
### 3. Weak Passwords
|
||||
**Problem**: Easy to guess or crack
|
||||
**Solution**: Enforce 8+ chars, complexity, password manager
|
||||
|
||||
### 4. No Backup Before Changes
|
||||
**Problem**: Can't rollback if needed
|
||||
**Solution**: Backup everything before changes
|
||||
|
||||
### 5. Overly Complex Rules
|
||||
**Problem**: Firewall rules break production
|
||||
**Solution**: Start simple, iterate
|
||||
|
||||
### 6. Ignoring Legacy Systems
|
||||
**Problem**: Old PLCs can't be secured
|
||||
**Solution**: Extra network controls around legacy
|
||||
|
||||
### 7. Documentation Neglect
|
||||
**Problem**: Changes not documented
|
||||
**Solution**: Make documentation part of change process
|
||||
|
||||
### 8. Set and Forget
|
||||
**Problem**: Security degrades over time
|
||||
**Solution**: Regular reviews and updates
|
||||
|
||||
---
|
||||
|
||||
## Resource Requirements
|
||||
|
||||
### Personnel
|
||||
|
||||
**Week 1-4 (Quick Wins):**
|
||||
- Control engineer: 40 hours
|
||||
- IT security: 20 hours
|
||||
- Management: 5 hours
|
||||
|
||||
**Week 5-8 (Network Security):**
|
||||
- Network engineer: 40 hours
|
||||
- Control engineer: 20 hours
|
||||
- IT security: 30 hours
|
||||
|
||||
**Week 9-12 (Monitoring & Policies):**
|
||||
- IT security: 40 hours
|
||||
- Control engineer: 20 hours
|
||||
- HR/Training: 10 hours
|
||||
- Management: 10 hours
|
||||
|
||||
### Tools and Software
|
||||
|
||||
**Essential (Free/Low Cost):**
|
||||
- [ ] TIA Portal (for PLC configuration)
|
||||
- [ ] Network mapping tool (e.g., Nmap)
|
||||
- [ ] Syslog server (e.g., syslog-ng)
|
||||
- [ ] Password manager
|
||||
- [ ] Documentation tool (e.g., Markdown)
|
||||
|
||||
**Recommended (Paid):**
|
||||
- [ ] Industrial firewall
|
||||
- [ ] VPN server
|
||||
- [ ] SIEM platform
|
||||
- [ ] Antivirus for OT
|
||||
- [ ] Network monitoring tool
|
||||
|
||||
---
|
||||
|
||||
## Appendices
|
||||
|
||||
### Appendix A: Critical Controls Quick Reference
|
||||
|
||||
**Top 10 Critical Controls (Do These First):**
|
||||
|
||||
1. **Enable PLC passwords** - Prevents unauthorized access
|
||||
2. **Configure IP ACLs** - Limits who can connect
|
||||
3. **Install firewall** - Separates IT from OT
|
||||
4. **Change default passwords** - Eliminates easy targets
|
||||
5. **Create backups** - Enables recovery
|
||||
6. **Enable logging** - Provides visibility
|
||||
7. **Disable unused services** - Reduces attack surface
|
||||
8. **Implement VPN** - Secures remote access
|
||||
9. **Deploy antivirus** - Protects Windows systems
|
||||
10. **Train staff** - Human firewall
|
||||
|
||||
### Appendix B: Weekly Checklist Template
|
||||
|
||||
```markdown
|
||||
## Weekly Security Checklist
|
||||
|
||||
Date: __________
|
||||
Completed by: __________
|
||||
|
||||
### Access Control
|
||||
- [ ] No new unauthorized users found
|
||||
- [ ] All remote access via VPN
|
||||
- [ ] No password violations detected
|
||||
|
||||
### Monitoring
|
||||
- [ ] Reviewed critical alerts
|
||||
- [ ] Checked firewall logs
|
||||
- [ ] Verified backup completion
|
||||
|
||||
### System Health
|
||||
- [ ] No unauthorized changes detected
|
||||
- [ ] Antivirus definitions current
|
||||
- [ ] System performance normal
|
||||
|
||||
### Physical Security
|
||||
- [ ] Control room access log reviewed
|
||||
- [ ] No unauthorized access detected
|
||||
- [ ] Equipment cabinets secured
|
||||
|
||||
Notes:
|
||||
__________________________________________
|
||||
```
|
||||
|
||||
### Appendix C: Emergency Contact Card
|
||||
|
||||
```
|
||||
┌─────────────────────────────────────┐
|
||||
│ CYBERSECURITY INCIDENT │
|
||||
│ EMERGENCY CONTACT CARD │
|
||||
├─────────────────────────────────────┤
|
||||
│ INCIDENT COMMANDER: │
|
||||
│ Name: ____________________________ │
|
||||
│ Phone: ___________________________ │
|
||||
│ │
|
||||
│ TECHNICAL LEAD: │
|
||||
│ Name: ____________________________ │
|
||||
│ Phone: ___________________________ │
|
||||
│ │
|
||||
│ OPERATIONS: │
|
||||
│ Name: ____________________________ │
|
||||
│ Phone: ___________________________ │
|
||||
│ │
|
||||
│ VENDOR SUPPORT: │
|
||||
│ Siemens: 1-800-________ │
|
||||
│ Firewall: ____________________ │
|
||||
│ │
|
||||
│ EXTERNAL: │
|
||||
│ ICS-CERT: 888-282-0870 │
|
||||
│ FBI Cyber: ___________________ │
|
||||
└─────────────────────────────────────┘
|
||||
```
|
||||
|
||||
### Appendix D: Pre-Change Checklist
|
||||
|
||||
Before making any security changes:
|
||||
|
||||
```
|
||||
CHANGE: _________________________________
|
||||
DATE: ___________________________________
|
||||
|
||||
PRE-CHANGE:
|
||||
[ ] Change documented and approved
|
||||
[ ] Tested in lab/non-production
|
||||
[ ] Backup created and verified
|
||||
[ ] Operations notified
|
||||
[ ] Maintenance window scheduled
|
||||
[ ] Rollback plan ready
|
||||
[ ] On-call support arranged
|
||||
|
||||
DURING CHANGE:
|
||||
[ ] Follow documented procedure
|
||||
[ ] Document any deviations
|
||||
[ ] Test functionality after each step
|
||||
|
||||
POST-CHANGE:
|
||||
[ ] Verify system functionality
|
||||
[ ] Update documentation
|
||||
[ ] Monitor for 24 hours
|
||||
[ ] Close change ticket
|
||||
|
||||
Sign-off:
|
||||
Engineer: __________ Date: __________
|
||||
Approver: __________ Date: __________
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
**Document Version**: 1.0
|
||||
**Last Updated**: February 16, 2026
|
||||
**For Use With**: industrial-network-security-guide.md
|
||||
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