mosh

>> maintain a persistent ssh tunnel SSH agent forwarding was merged 3 months ago (after the patch waited 7+ years in one form or another), but per https://unix.stackexchange.com/a/437299 → https://github.com/mobile-shell/mosh/issues/337 (2012), mosh does not yet officially support port forwarding, despite https://github.com/mobile-shell/mosh/pull/583 (2013 → 2015 → 2017). It appears the initiator of the original patch has maintained their fork: https://github.com/rinne/mosh (disclaimer: I don't use mosh and have not tried or reviewed the differences from the official version). Perhaps https://github.com/MisterTea/EternalTerminal is a viable alternative. Per https://github.com/MisterTea/EternalTerminal/issues/473#issu..., 'Several security teams have reviewed ET.'

there is a fork with port forwarding support https://github.com/rinne/mosh and a PR with a long discussion https://github.com/mobile-shell/mosh/pull/696 on why it's not merged you can compile them yourself or if you want to skip the step I recently set up GitHub actions to compile linux binaries of this [1][2], tested by a sample of 1 so no guarantees it works, was planning on doing a tap PR/tap of it at some point also the official developers have been involved a project to solve this while improving the whole-agent approval things also https://github.com/StanfordSNR/guardian-agent , but I couldn't get it to work which is why I tried the fork and got that working [1] https://github.com/gnyman/mosh/actions/runs/1068715036 [2] https://github.com/gnyman/mosh/actions/runs/1068715035

I only used SSH over it, so unfortunately I don't. And I recommend mosh ( https://github.com/rinne/mosh - the SSH Agent forwarding fork/branch ) to hide the latency as much as possible.

FWIW, there's this: https://github.com/rinne/mosh/tree/ssh-agent-forwarding I haven't used the agent forwarding patch myself, though. The patch is rather large, which may be the reason it was never merged. The author (rinne) is the former CTO of ssh.com, by the way.