There isn't a lot of info on the bug to help, but it already seems to be a config issue. For those you are better with a community page like askubuntu.com as this is about fixing bugs in the package and not about guiding to a valid configuration.
A search showed https://askubuntu.com/questions/60350/putty-works-but-ssh-from-terminal-fails-after-ssh2-msg-kexinit https://askubuntu.com/questions/344863/ssh-new-connection-begins-to-hang-not-reject-or-terminate-after-a-day-or-so-on https://stackoverflow.com/questions/2419412/ssh-connection-stop-at-debug1-ssh2-msg-kexinit-sent Maybe one of these can already help you? -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1849878 Title: Debu1: SSH2_MSG_KEXINIT sent Status in openssh package in Ubuntu: Incomplete Bug description: I try to make the connection with an NSA that lives on the same network of my Ubuntu 1804 server, however performing authentication via SSH hangs in Debu1: SSH2_MSG_KEXINIT sent. Tracked error: Conection closed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1849878/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
