There is some other weirdness going on: $ curl -I https://www.ietf.org/id/1id-abstracts.txt HTTP/1.1 200 OK Date: Wed, 13 Jul 2016 11:12:11 GMT Content-Length: 0 Last-Modified: Wed, 13 Jul 2016 11:07:00 GMT ETag: "0-537826276b224" Expires: Wed, 13 Jul 2016 15:12:11 GMT Cache-Control: public, max-age=14400 Server: cloudflare-nginx CF-RAY: 2c1c4c62ca9c2744-FRA [...] Reported yesterday. Grüße, Carsten Jari Arkko wrote: > Oops. Seems to be a more generic problem with trac.tools.ietf.org. I’ve raised an issue. > > Jari >