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What are the benefits of a server having multiple public IP addresses? (lemdro.id)

submitted 1 year ago by Matt@lemdro.id to c/selfhosted@lemmy.world

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My VPS provider is running a promotion where I can get up to 5 additional public IPv4 addresses for a one-time cost of $25 each. I have always only used a single public IP address per VPS. Would there be any advantage of having additional public IP addresses?

I know some people do not consider a VPS self-hosting, but this is the most relevant community I could think of and the question is also applicable for homelabs as well.

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[–] catloaf@lemm.ee 33 points 1 year ago (2 children)

For http(s), yes. Other services that don't support host routing, which is most of them, no.

[–] kn33@lemmy.world 19 points 1 year ago

Most things people self host are either torrent clients, HTTP(s) or are game servers. The first one can pick a port arbitrarily. The second can do host routing. The third - some of them support SRV records so you can direct the client to an arbitrary port. It's becoming less common to need multiple public IPv4 addresses.

[–] sugar_in_your_tea@sh.itjust.works 2 points 1 year ago

Depending on the service, you totally can, provided they include some way to recognize them. For example, the first few bytes of SSH are unique, so I made a simple TCP server that would forward traffic to an HTTP(S) server or SSH server depending on those bytes.