Package: security.debian.org From time to time 128.31.0.36 is out of sync. (eg. time between DSA-1420 and DSA-1421) But also protocol problems exist using a caching algorithm.
Neither the "Last-modified:", nor the ETag used for caching information in HTTP/1.1 [1,2,3] is in sync on all three servers Here is example output of 3 telnet sessions with GET /debian-security/dists/etch/updates/Release HTTP/1.1 Host: security.debian.org --------------------- On 128.31.0.36: ETag: "9b0002-57b3-a3c1d700" Last-Modified: Sat, 08 Dec 2007 11:26:52 GMT On 212.211.132.250: Last-Modified: Sat, 08 Dec 2007 11:45:17 GMT ETag: "53cffc4-57b3-e59ecd40" On 212.211.132.32: Last-Modified: Sat, 08 Dec 2007 11:45:17 GMT ETag: "4006fa8-57b3-e59ecd40" --------------------- For ETag in apache you'll find a solution in [4]. Last-Modified-Time differences are part of a syncing problem. [1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.19 [2] http://en.wikipedia.org/wiki/HTTP_ETag [3] http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.29 [4] http://httpd.apache.org/docs/2.0/mod/core.html#fileetag
