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sica-fondt/knowledge/cyber-skills/skills/implementing-network-intrusion-prevention-with-suricata/references/api-reference.md
Claude 24f816b6a3
Consolidate 22 sibling repos into layered organism structure 
Place useful parts of the surrounding repos into sica-fondt by layer, per the
body model (Ada = membrane; brain/endocrine/capabilities/knowledge non-Ada):

- brain/        LLM reasoning + providers (dapr, hermes, MoMoA)
- capabilities/ REPRAG sidecars: hermes tools/skills, dapr tools, parallel
                dispatch, A51 channels, and the OSINT cluster
- knowledge/    LORAG corpus: 754 cyber-skills, agency personas, secure-coding,
                MITRE ATT&CK data
- reference/    defensive threat-reference (C3, shhbruh doc) + AdaYaml parser

License handling: AGPL sources (worldosint, advanced_evolution, mercury,
Reticulum) and GPL DeTTECT are SPEC-only clean-room/port descriptions — no
copyleft code copied. MIT/Apache/data parts copied as working trees.

Safety: shhbruh escape/persistence material and C3 covert-C2 kept as reference
only, not wired into the running organism. See CONSOLIDATION.md.

https://claude.ai/code/session_01UehUqEXXJJCsHoA4voCU5c
2026-06-10 06:53:01 +00:00

2.9 KiB
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API Reference: Implementing Network Intrusion Prevention with Suricata

Suricata Rule Syntax

action protocol src_ip src_port -> dst_ip dst_port (options;)

Actions

Action Mode Description
alert IDS/IPS Generate alert
pass IDS/IPS Stop inspection of packet
drop IPS only Drop packet and generate alert
reject IPS only Send RST/ICMP unreachable + drop
rejectsrc IPS only Send RST/unreachable to source
rejectboth IPS only Send RST/unreachable to both

Example Rules

# Block known malicious TLS certificate
drop tls $HOME_NET any -> $EXTERNAL_NET any (msg:"Malicious TLS Cert"; tls.cert_subject; content:"CN=badactor.com"; sid:1000001; rev:1;)

# Detect and drop SQL injection attempts
drop http $EXTERNAL_NET any -> $HOME_NET any (msg:"SQL Injection Attempt"; flow:established,to_server; http.uri; pcre:"/(\%27)|(\')|(\-\-)|(\%23)|(#)/i"; sid:1000002; rev:1;)

# Alert on DNS exfiltration (long subdomain)
alert dns $HOME_NET any -> any 53 (msg:"DNS Exfiltration Possible"; dns.query; pcre:"/^[a-z0-9]{32,}\./i"; threshold:type both, track by_src, count 10, seconds 60; sid:1000003; rev:1;)

suricata-update Commands

# Update rule sources
suricata-update update-sources
suricata-update list-sources

# Enable Emerging Threats Open ruleset
suricata-update enable-source et/open

# Update rules and reload
suricata-update
suricatasc -c reload-rules

Suricata CLI

# IDS mode (passive)
suricata -c /etc/suricata/suricata.yaml -i eth0

# IPS mode (inline via NFQUEUE)
suricata -c /etc/suricata/suricata.yaml -q 0

# Offline PCAP analysis
suricata -c /etc/suricata/suricata.yaml -r capture.pcap -l /var/log/suricata/

# Test configuration
suricata -T -c /etc/suricata/suricata.yaml

# Unix socket control
suricatasc -c reload-rules
suricatasc -c dump-counters
suricatasc -c iface-stat eth0

EVE JSON Log Format

{
  "timestamp": "2025-01-15T10:30:00.000000+0000",
  "event_type": "alert",
  "src_ip": "192.168.1.100",
  "dest_ip": "10.0.0.5",
  "src_port": 52341,
  "dest_port": 443,
  "proto": "TCP",
  "alert": {
    "action": "blocked",
    "gid": 1,
    "signature_id": 2028759,
    "rev": 3,
    "signature": "ET MALWARE Cobalt Strike Beacon",
    "category": "A Network Trojan was detected",
    "severity": 1
  }
}

Performance Tuning

Setting Default Recommended (IPS)
max-pending-packets 1024 4096-65000
default-packet-size 1514 1514
runmode autofp workers
detect.profile medium high
mpm-algo auto hs (Hyperscan)

References