[Bug 1971888] Re: Can not ssh to github.com or gitlab.com when upgrading to 22.04

[Sergio Durigan Junior]

Good catch, Seth :-).

Apparently this topic has been discussed in the past in bug #1822370 and
https://lists.debian.org/debian-devel/2019/04/msg00010.html.  Those
discussions resulted in the decision to revert the IPQoS default values
from openssh, which is something we're still doing.  The default value
for Debian/Ubuntu packages is "lowdelay", which, from what you said
above, seems to be what's causing the problem for you.

This can be caused by how your router is handling QoS packets, for
example.  Either way, could you test this using a Debian testing
container/VM and check if you can reproduce the issue there?  If yes,
then I would suggest opening a bug against the Debian openssh package,
which is the best way to implement/discuss this decision IMHO.  If you
do so, please link the Debian bug here so that we can also keep track of
its progress.

Thanks.

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https://bugs.launchpad.net/bugs/1971888

Title:
  Can not ssh to github.com or gitlab.com when upgrading to 22.04

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  Dear all,

  After the upgrading to Ubuntu 22.04 I can not use git over ssh.

  The best way to reproduce the error is:

  ```
  acs at lsp-022:~$ ssh -vT git at github.com
  OpenSSH_8.9p1 Ubuntu-3, OpenSSL 3.0.2 15 Mar 2022
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
  debug1: /etc/ssh/ssh_config line 21: Applying options for *
  debug1: Connecting to github.com [140.82.121.4] port 22.
  debug1: connect to address 140.82.121.4 port 22: Connection timed out
  ```

  Before the upgrading I can connect correctly with:

  ```
  ssh -vT git at github.com
  OpenSSH_8.2p1 Ubuntu-4ubuntu0.4, OpenSSL 1.1.1f  31 Mar 2020
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 21: include /etc/ssh/ssh_config.d/*.conf matched no files
  debug1: /etc/ssh/ssh_config line 23: Applying options for *
  debug1: Connecting to github.com [140.82.121.4] port 22.
  debug1: Connection established
  ```

  The same issue is happening with gitlab.com.

  Probably it is related with the OpenSSL version.

  Cheers!

  -- Alvaro

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ssh 1:8.9p1-3
  ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
  Uname: Linux 5.15.0-27-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: GNOME
  Date: Thu May  5 23:00:33 2022
  InstallationDate: Installed on 2021-03-08 (423 days ago)
  InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
  PackageArchitecture: all
  SourcePackage: openssh
  UpgradeStatus: Upgraded to jammy on 2022-05-05 (0 days ago)

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