Keel-Linux/keel-web

Anubis challenge returns 500 to clients that do not accept gzip #2

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opened 2026-10-01 18:59:25 -03:00 by marcos-mendez · 0 comments

marcos-mendez commented

2026-10-01 18:59:25 -03:00

(Migrated from github.com)

Seen in the Phase 3 run of the step7b Web image (2026-10-01), cloud simple mode: an unverified Googlebot request without Accept-Encoding: gzip got HTTP 500 instead of the Anubis challenge page; with gzip the challenge is served. Likely related to the Coraza body handling (libnginx-mod-http-coraza#2/#3 and coraza_delay_response_headers off from common#25) or to Anubis' own encoding. Reproduce on the image with curl with and without --compressed, find the cause, and add the no-gzip case to the Phase 3 test.

Seen in the Phase 3 run of the step7b Web image (2026-10-01), cloud simple mode: an unverified Googlebot request without Accept-Encoding: gzip got HTTP 500 instead of the Anubis challenge page; with gzip the challenge is served. Likely related to the Coraza body handling (libnginx-mod-http-coraza#2/#3 and coraza_delay_response_headers off from common#25) or to Anubis' own encoding. Reproduce on the image with curl with and without --compressed, find the cause, and add the no-gzip case to the Phase 3 test.

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Keel-Linux/keel-web#2

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