←back to thread

Ifconfig.co – Hacker-friendly “What is my IP address”

(ifconfig.co)
224 points gurjeet | 2 comments | 30 Mar 21 08:02 UTC | HN request time: 0.001s | source
Show context
rnhmjoj ◴[30 Mar 21 18:13 UTC] No.26638168[source]▶
I wonder how much more it will take before the answer to "What is my IP address?" will simply be "Look in the settings" or "Just type ip addr in the terminal".

We are so used to NAT that we don't realize how crazy it is that you essentially have to ask a stranger what's your address. It's really difficult to explain this to someone with no networking knowledge. Nothing else works this way: phone numbers, emails or postal addresses.

replies(4): >>26638280 #>>26638286 #>>26638463 #>>26639036 #
marcosscriven ◴[30 Mar 21 19:14 UTC] No.26639036[source]▶
You don’t really have to ask a stranger - you can ask your router, in a similar way you can check the door number on your street.
replies(4): >>26639422 #>>26640496 #>>26640565 #>>26643982 #
remram ◴[30 Mar 21 19:44 UTC] No.26639422[source]▶
Ask your router? Is there a generic way to do this, or do you mean "look into its vendor-specific management interface"?
replies(1): >>26639748 #
1. the8472 ◴[30 Mar 21 20:08 UTC] No.26639748{3}[source]▶
NAT-PMP, UPnP-IGD or PCP can be used for that. Home routers usually support at least one of those, but you may have to explicitly enable it.
replies(1): >>26640062 #
2. remram ◴[30 Mar 21 20:32 UTC] No.26640062[source]▶
3 competing techs... Of course this doesn't suffice in a variety of situations which is why STUN is a thing: https://tools.ietf.org/html/rfc3489