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Apparently I installed that thing in 2006 and I last updated it in 2016, then I quit updating it for some reason that I totally forgot. Probably laziness...
It's been running for quite some time and we kind of forgot about it in the closet, until the SSH tunnel we use to get our mail outside our home stopped working because modern openssh clients refuse to use the antiquated key cipher I setup client machines with way back when any longer.
I just generated new keys with a more modern cipher that it understands (ecdsa-sha2-nistp256) and left it running. Because why not 🙂
I'd still maybe build a modern OpenSSH package.
There's been an awful lot of RCEs in the past two decades and uh, if that's rawdogging the internet, I'm honestly shocked you haven't been hit with any by now.
Eh, building anything modern on a system that old would be painful I bet.
Maybe you could use https://github.com/openssh/openssh-portable since that’s meant to be portable. I’d certainly would give it a try if I didn’t want to bother trying to upgrade that system. Then again, trying to upgrade it through the releases to a modern Debian might be fun too.