[Bug 1848700] [NEW] 18LTS SSH server does not accept sshv1+v2 clients

[ne1]

Public bug reported:

i.e receiving version SSH-1.99 - openssh-server drops connection saying wrong version received while it should be OK
upstream bug here: https://bugzilla.mindrot.org/show_bug.cgi?id=2810 i.e. fixed in 7.7

Problem n impact is detailed here (cannot make backups from network gear to 18LTS):
https://community.cisco.com/t5/network-management/unable-to-ssh-from-xr-router-to-ubuntu-server/m-p/3844367

** Affects: openssh (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1848700

Title:
  18LTS SSH server does not accept sshv1+v2 clients

Status in openssh package in Ubuntu:
  New

Bug description:
  i.e receiving version SSH-1.99 - openssh-server drops connection saying wrong version received while it should be OK
  upstream bug here: https://bugzilla.mindrot.org/show_bug.cgi?id=2810 i.e. fixed in 7.7

  Problem n impact is detailed here (cannot make backups from network gear to 18LTS):
  https://community.cisco.com/t5/network-management/unable-to-ssh-from-xr-router-to-ubuntu-server/m-p/3844367

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