this post was submitted on 06 Jun 2025
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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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[–] atzanteol@sh.itjust.works 4 points 1 day ago

You got the basic idea from other posters, but there's also a lot of weird crap in there as well.

Basically you only need multiple IPs when dealing with services that only really operate on "well known ports". DNS and SMTP being the usual culprits. For most home users there this is no big deal - even if you wanted to host those services it's unlikely that you would need more than one ip to do so. HTTP solved this in '97 with HTTP/1.1 which allowed for host headers, which let's a single server host multiple sites.

This isn't something new that nginx solved. 😂