Fedora 35 with openssh-8.7p1-3.fc35.x86_64 When I run ssh like so connecting to a range of other Linux machines: ssh -l root <remote host> "set -x; pwd; exit" /root + pwd + exit or ssh -t -l root <remote host> "set -x; pwd; exit" + pwd /root + exit or ssh -tt -l root <remote host> "set -x; pwd; exit" + pwd /root + exit It will never (I have let it go about ten minutes) actually exit ssh. When I ssh with no command, I get the bash prompt and when I type exit<nl>, it will exit ssh and return to the local bash prompt after around four seconds. It doesn't matter what user I connect as, that doesn't affect the hang. When I do the same back to my f35 machine, I don't get a hang and it returns to the local bash prompt immediately when I exit from an interactive session. I'm using public key auth in all cases, the remote machines are derivitives of RHEL 6,7,8 running in AWS and sometimes across a VPN and sometimes not. Can anybody suggest what is causing the hang and how to avoid it? Thanks Linus