OpenSSH is certainly the standard amongst SSH servers, however, I'm curious if there are serious alternatives that offer something missing in OpenSSH? I know there's a patch floating around that allowed some buffer to be configurable and boosted `scp` performance, for example, but I'm curious if there are other servers that offer anything else interesting.
mosh uses openssh (or some other ssh) under the covers to perform authn + authz and start the remote mosh server (and possibly to communicate the udp port that the remote mosh server is listening on to the client mosh?)
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OpenSSH is certainly the standard amongst SSH servers, however, I'm curious if there are serious alternatives that offer something missing in OpenSSH? I know there's a patch floating around that allowed some buffer to be configurable and boosted `scp` performance, for example, but I'm curious if there are other servers that offer anything else interesting.
Dropbear is a lightweight replacement for OpenSSH. It runs on things like routers (openwrt) and certain android ROMs.
Used it through an sshserver app for Android, had no troubles doing a full scp -R <phone> <backup> with it.
You might find it worth while to investigate mosh[0] as an alternative to OpenSSH.
[0] - https://mosh.mit.edu/
mosh uses openssh (or some other ssh) under the covers to perform authn + authz and start the remote mosh server (and possibly to communicate the udp port that the remote mosh server is listening on to the client mosh?)