The easiest way I found to reproduce was to monkey patch the python paramiko library. I've attached a short script which can be used to test a host. It requires either python-paramiko or python3-paramiko to run.
** Attachment added: "test_bug_1863930.py" https://bugs.launchpad.net/ubuntu/bionic/+source/openssh/+bug/1863930/+attachment/5332797/+files/test_bug_1863930.py -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1863930 Title: SSH 1.99 clients fail to connect to openssh-server 1:7.6p1-4ubuntu0.3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1863930/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
