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Block known datacenter ranges flooding Phabricator
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Authored by dereckson on Feb 11 2026, 22:41.
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Details

Summary

Phabricator instances receive a very large number of requests
from datacenter servers.

Pending Anubis implementation, this temporary block will mitigate
the current server load.

The ranges2geo.py utility allows to convert a text file containing
CIDR ranges into a geo block for ngx_http_geo_module.

Test Plan

Deploy on docker-002

Diff Detail

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rOPS Nasqueron Operations
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Event Timeline

dereckson created this revision.

Servers log excerpt (2026-02-11)

docker-002 22:58 dereckson: End of nginx deployment. I can confirm an IMMEDIATE impact on DevCentral, it now again serves page very quickly.

docker-002 22:56 dereckson: Deploy previous nginx changes: rm of ssl_trusted_certificate, logs by service

docker-002 22:54 dereckson: Refresh Salt modules

docker-002 22:50 dereckson: Deploy nginx geo_flood_datacenter fix for DevCentral and other Phabricator instances (D3947)

dereckson added a reviewer: ptdradmin.
This revision is now accepted and ready to land.Feb 19 2026, 15:07