Echo's RealIP trusted X-Forwarded-For and X-Real-Ip from any peer
when no IPExtractor is set. That fed the login and registration rate
limits and the API trace client address, so a client could dodge a
limit by rotating a forged header.
Add pkg/clientip, one resolver for the whole server. With
--trusted-proxies / LOCALAI_TRUSTED_PROXIES (IPs and CIDRs, empty by
default), the forwarded chain is read only when the TCP peer is
listed. The client is the right-most X-Forwarded-For entry that is
not a trusted proxy; a malformed entry stops the walk. With the flag
unset every request resolves to its TCP peer.
The resolver is set as Echo's IPExtractor and used by the access log
(--log-client), so all consumers agree.
Assisted-by: Claude:claude-sonnet-5-5 go gofmt
Operators could not tell which client sends requests that are refused
with 401. Add --log-client (LOCALAI_LOG_CLIENT, off by default). When
set, the HTTP request log line also carries duration, remote, user_agent
and, when present, request_id.
The address is the TCP peer. It is never read from X-Forwarded-For,
X-Real-Ip or Forwarded, because LocalAI has no trusted-proxy setting and
any client can forge those headers. Behind a reverse proxy the value is
the proxy address. Authorization headers, cookies, query strings and
bodies are never logged. User agent and request id are cut to a fixed
length and have control characters replaced.
Assisted-by: Claude:claude-sonnet-5-5 go gofmt
Ettore Di Giacinto