Caddy's tracing directive, switched by WEB_TRACING so a server without a collector does not log
a failed export every few seconds. It continues an incoming traceparent (the page starts one per
tap, #190) and passes it to ipx, so a request is one trace from the browser through Caddy into
ipx, and Caddy's access log carries its traceID. Checked against Tempo with a probe container:
service.name and deployment.environment.name come from the OTEL_ variables, over OTLP/HTTP.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Caddy logs one JSON line a request, filtered: no ?token= in the address and no request
headers, which hold the session cookie and Access's token. Its default log, errors included,
has the same filter, since an error line carries the request too. The directory logs a line a
refresher round, so the dashboard can show its progress.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Caddy reports an IPv4 peer as plain IPv4 even on its dual-stack socket, so remote_ip
192.168.64.1 matched all along. The stripping seen came from testing on Tower itself, whose
requests reach the published port as 192.168.1.130, rightly not the tunnel. From
cloudflared's network a forged Access token reaches ipx's check and is refused.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Caddy listens dual-stack, so the ipx_default gateway connects as ::ffff:192.168.64.1, and
remote_ip 192.168.64.1 does not match it: every Cf-Access-* header was stripped, the
tunnel's too. The browser suite binds Caddy to 127.0.0.1, IPv4 only, so it never saw it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
web/build.mjs builds a static site, web/dist, with the icons and typeface
beside the pages; Dockerfile.web serves it with Caddy, which passes /api
and /media to ipx on the same origin, so cookies, live updates and
Cloudflare Access work as before. ipx serves no page any more: build.rs
and every include_str! of the web files are gone, and its image is built
without node.
What ipx did to the page as it served it is kept another way. Caddy asks
ipx before serving a page (forward_auth): /api/page-check sends a browser
not signed in to /login and a non-admin away from /admin, and refuses them
/admin.js; /api/login-check sends someone Access vouches for past the
form; a page asked for with ?token= goes to /api/signin, which sets the
cookie. The theme and the admin link, once written into the page per
person, are set by web/boot.js in <head> from the theme cookie and the
last visit, before the first frame, and /api/me brings the version and
the account's theme from before.
Caddy strips the Cf-Access-* headers from every peer but TUNNEL_PEER, the
address cloudflared's requests come from, which is the boundary
trusted_proxies drew; ipx then trusts only Caddy's address.
The browser suite runs Caddy in front of its daemon, so it tests what
production would run. Not deployed: production's cutover is on #203.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
