this post was submitted on 12 Feb 2024
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cross-posted from: https://programming.dev/post/9907720

The SSH port is 22. This is the story of how it got that port number. And practical configuration instructions.

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[–] ExtremeDullard@lemmy.sdf.org 26 points 9 months ago (7 children)

I learned something today. Thanks!

[–] perishthethought@lemm.ee 16 points 9 months ago (6 children)

Me too. My biggest takeaway though was that 'SSH' is a company today, providing network and security services. Interesting!

[–] SpaceCadet@feddit.nl 27 points 9 months ago (4 children)

It was a company almost from the start. In the mid 90s Tatu Ylonen created ssh v1 and released it as freeware, then shortly afterwards apparently he regretted it and created ssh v2, made it proprietary and commercialized it with his company.

In the late 90s some OpenBSD guys then forked the unencumbered ssh v1 source to create OpenSSH and implemented ssh v2 with it and their ssh version eventually gained traction and became dominant.

[–] BautAufWasEuchAufbaut@lemmy.blahaj.zone 4 points 9 months ago (1 children)

As freeware or free software? Because if it was freeware, I don't understand how OpenBSD could have forked it

[–] SpaceCadet@feddit.nl 2 points 9 months ago* (last edited 9 months ago)

It was a custom license more permissive than the BSD license.

It's still part of the official OpenSSH license, see the first section here: https://cvsweb.openbsd.org/src/usr.bin/ssh/LICENCE?rev=HEAD

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