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November 3, 2025 19:43
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Suricata IDS/IPS Installation and Initial Configuration - Ubuntu 24.04 homelab setup with rule management
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| #!/bin/bash | |
| # Suricata IDS/IPS Installation and Initial Configuration | |
| # For Ubuntu 24.04 - Homelab Network Traffic Analysis Setup | |
| # ============================================================================ | |
| # Installation | |
| # ============================================================================ | |
| # Install on Ubuntu 24.04 | |
| sudo add-apt-repository ppa:oisf/suricata-stable | |
| sudo apt update | |
| sudo apt install suricata jq | |
| # Verify installation | |
| suricata --build-info | |
| # Enable Suricata service | |
| sudo systemctl enable suricata | |
| sudo systemctl start suricata | |
| # ============================================================================ | |
| # Initial Configuration - /etc/suricata/suricata.yaml | |
| # ============================================================================ | |
| cat << 'YAML_CONFIG' | sudo tee -a /etc/suricata/suricata.yaml | |
| # Network interfaces | |
| af-packet: | |
| - interface: ens19f1 # Mirror interface | |
| cluster-id: 99 | |
| cluster-type: cluster_flow | |
| defrag: yes | |
| use-mmap: yes | |
| tpacket-v3: yes | |
| ring-size: 200000 | |
| # Home network configuration | |
| vars: | |
| address-groups: | |
| HOME_NET: "[10.0.0.0/8,192.168.0.0/16,172.16.0.0/12]" | |
| EXTERNAL_NET: "!$HOME_NET" | |
| DNS_SERVERS: "[10.0.1.1,1.1.1.1,8.8.8.8]" | |
| HTTP_SERVERS: "$HOME_NET" | |
| SMTP_SERVERS: "$HOME_NET" | |
| SQL_SERVERS: "$HOME_NET" | |
| port-groups: | |
| HTTP_PORTS: "80,443,8080,8443" | |
| SHELLCODE_PORTS: "!80" | |
| SSH_PORTS: 22 | |
| # Performance tuning | |
| threading: | |
| set-cpu-affinity: yes | |
| cpu-affinity: | |
| - management-cpu-set: | |
| cpu: [ 0 ] | |
| - receive-cpu-set: | |
| cpu: [ 1,2,3,4 ] | |
| - worker-cpu-set: | |
| cpu: [ 5,6,7,8 ] | |
| # Enable EVE JSON output | |
| outputs: | |
| - eve-log: | |
| enabled: yes | |
| filetype: regular | |
| filename: eve.json | |
| types: | |
| - alert | |
| - http | |
| - dns | |
| - tls | |
| - files | |
| - ssh | |
| - flow | |
| YAML_CONFIG | |
| # ============================================================================ | |
| # Rule Management with Suricata-Update | |
| # ============================================================================ | |
| # Configure rule sources | |
| sudo suricata-update update-sources | |
| # Enable Emerging Threats Open rules | |
| sudo suricata-update enable-source et/open | |
| # Enable additional sources | |
| sudo suricata-update enable-source tgreen/hunting | |
| sudo suricata-update enable-source sslbl/ssl-fp-blacklist | |
| sudo suricata-update enable-source oisf/trafficid | |
| # Update rules | |
| sudo suricata-update | |
| # Schedule automatic updates | |
| cat << 'EOF' | sudo tee /etc/cron.daily/suricata-update | |
| #!/bin/bash | |
| /usr/bin/suricata-update | |
| /bin/systemctl reload suricata | |
| EOF | |
| sudo chmod +x /etc/cron.daily/suricata-update |
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