I'm not sure why this is a problem now as the old archive servers were doing the same thing. In any case, I've added the following to apache2 configs:
| AddType application/pgp-signature .gpg Testing without: > GET > /ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz.gpg > HTTP/1.1 > Host: archive.ubuntu.com > ... < Last-Modified: Thu, 16 Jul 2020 08:58:10 GMT < ETag: "612-5aa8b3d596c80" < Accept-Ranges: bytes < Content-Length: 1554 < Content-Type: application/x-gzip Testing with: > GET > /ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz.gpg > HTTP/1.1 > Host: archive.ubuntu.com >... < Last-Modified: Thu, 16 Jul 2020 08:58:10 GMT < ETag: "612-5aa8b3d596c80" < Accept-Ranges: bytes < Content-Length: 1554 < Content-Type: application/pgp-signature -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1888058 Title: Got “Authentication failed” while running do-release-upgrade from 19.10 to 20.04 LTS with proxy configured To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1888058/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
