CrowdSec Tutorial Lesson 07 - Firewall Bouncers
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Stage 03 starts. The decision was made — now ENFORCE it. The firewall bouncer drops packets at the kernel: fastest, simplest blocking. We cover the iptables and nftables backends, IPSET integration, and tuning for high-traffic hosts.
📍 Stage 03 — RESPONSE · Lesson 07 of 13
⏱ CHAPTERS
00:00 Stage 03 — Response begins
01:45 What enforcement means at L3/L4
02:30 Install: crowdsec-firewall-bouncer-iptables
03:30 How IPSET makes 100k bans fast
04:30 iptables vs nftables — which to choose
05:00 Configuration: which interfaces, which chains
05:30 Testing: ban + tcpdump to verify drop
06:00 Tuning: deny_action, deny_log, ipv4 vs ipv6
🔗 LINKS REFERENCED IN THIS LESSON
CrowdSec official docs: https://docs.crowdsec.net
The Hub: https://hub.crowdsec.net
CrowdSec GitHub: https://github.com/crowdsecurity/crow...
🎯 WHAT YOU'LL BE ABLE TO DO AFTER THIS LESSON
Stage 03 starts. The decision was made — now ENFORCE it. The firewall bouncer drops packets at the kernel: fastest, simplest blocking. We cover the iptables and nftables backends, IPSET integration, and tuning for high-traffic hosts.
🎓 CROWDSEC MASTERY FULL PLAYLIST
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📚 FAIL2BAN MASTERY (prequel)
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