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Let’s Encrypt Begins Supporting IP Address Certificates (linuxiac.com)

submitted 11 months ago by KarnaSubarna@lemmy.ml to c/selfhosted@lemmy.world

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Who benefits from this? Even though Let’s Encrypt stresses that most site operators will do fine sticking with ordinary domain certificates, there are still scenarios where a numeric identifier is the only practical choice:

Infrastructure services such as DNS-over-HTTPS (DoH) – where clients may pin a literal IP address for performance or censorship-evasion reasons.
IoT and home-lab devices – think network-attached storage boxes, for example, living behind static WAN addresses.
Ephemeral cloud workloads – short-lived back-end servers that spin up with public IPs faster than DNS records can propagate.

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[–] Zagorath@aussie.zone 9 points 11 months ago (2 children)

In much simpler terms:

Think of an IP address like a street address. 192 My Street.

There might be multiple businesses at one street address. In real life we address them with things like 1/192 My Street and 2/192 My Street, but there's no direct parallel to that in computer networks. Instead, what we do is more like directing your letter to say "Business A c/o 192 My Street". That's what SNI does.

Because we have to write all of that on the outside of the envelope, everyone gets to see that we're communicating with Business A. But what if one of the businesses at 192 My Street is highly sensitive and we'd rather people didn't know we were communicating with them? @bjoern_tantau@swg-empire.de's proposal is basically like if you put the "Business A" part inside the envelope, so the mailman (and anyone who sees the letter on the way) only see that it's going to 192 My Street. Then the front room at that address could open the envelope and see that the ultimate destination is Business A, and pass it along to them.

[–] AnUnusualRelic@lemmy.world 6 points 11 months ago

There's Encrypted Client Hello, supported by major browsers that does the SNI encryption. It's starting to be fairly widely supported.

[–] Vinstaal0@feddit.nl 1 points 11 months ago

192 My Street

Except that with street addresses there is such a lack of inconsistency on how they work and are written that it is funny