88670f028f
Measured on the demo box against the same 24h of real traffic. Episode 12 (detection, blocklist, firewall): - crowdsec/ with install notes and the traps: port 8080 clash, empty first blocklist pull, replay forensic-mode dropping events (FIFO workaround), ssh-time-based-bf shipping remediation:false, the AppSec collections that refuse to start without extra rules. - firewall bouncer in nftables mode (input + forward), which blocks Docker-published ports and survives ufw reload; iptables/DOCKER-USER does not. - HARDENING.md episode 12 section with the numbers: fail2ban 4 banned IPs vs CrowdSec 23 detected / 1 blocked, blocklist overlap 50% of IPs but 19% of attempts, and the mode=normal blind spot for key-only root attempts. Episode 13 (AppSec WAF): - caddy/Dockerfile now builds the CrowdSec bouncer and AppSec handler alongside rate-limit, pinned to v0.14.1. - Caddyfile imports a crowdsec snippet (bouncer + appsec) on every site except vpn; compose passes CROWDSEC_BOUNCER_KEY and host.docker.internal. - Measured: virtual patching blocks known CVEs only (7 of 41 probes, near-zero false positives); OWASP CRS raises that to 27 of 41 but breaks git push and wiki editing at default paranoia. Default stays vpatch+generic. fail2ban config unchanged. No secrets or real domains/IPs in tracked files.
13 lines
677 B
Docker
13 lines
677 B
Docker
# episode 10: the stock caddy:2-alpine image cannot rate limit. The directive
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# lives in a plugin (github.com/mholt/caddy-ratelimit) that has to be compiled
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# in with xcaddy - there is no runtime "enable" for it.
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# episode 12: same trick for CrowdSec. The bouncer (http) and the AppSec
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# handler (appsec) are plugins too, pinned to a release tag instead of @main.
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FROM caddy:2-builder-alpine AS builder
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RUN xcaddy build \
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--with github.com/mholt/caddy-ratelimit \
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--with github.com/hslatman/caddy-crowdsec-bouncer/http@v0.14.1 \
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--with github.com/hslatman/caddy-crowdsec-bouncer/appsec@v0.14.1
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FROM caddy:2-alpine
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COPY --from=builder /usr/bin/caddy /usr/bin/caddy
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