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What's the real danger of opening ports? (feddit.it)

submitted 13 hours ago by dontblink@feddit.it to c/selfhosted@lemmy.world

36 comments fedilink hide all child comments

Some services run really good behind a reverse proxy on 443, but some others can really become an hassle.. And sometimes just opening other ports would be easier than to try configuring everything to work through 443.

An example that comes to my mind is SSH, yeah you can use SSLH to forward requests coming from 443 to 22, but it's so much easier to just leave 22 open..

Now, for SSH, if you have certificate authentication or a strong password, I think you can feel quite safe, but what about other random ports? What risks I'm exposing my server to if I open some of them when needed for a service? Is the effort of trying to pass everything through 443/80 worth it?

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[–] ryannathans@aussie.zone 11 points 9 hours ago (1 children)

Exposing SSH is not recommended, it's a hot attack target. Expose a VPN and use that to SSH in.

[–] 0x0@lemmy.zip 2 points 6 hours ago (1 children)

Or use port-knocking for SSH.

[–] sfjvvssss@lemmy.world 4 points 5 hours ago

While this helps getting volume down it just adds a layer of obscurity and the service behind should still be treated and maintained as if it was fully public-facing.