Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am trying to find my IP on VPN (PPTP) so I tried "ipconfig getifaddr ppp0" but it gave me "get if addr ppp0 failed, (os/kern) failure." Why does it fail and what should I do instead? ifconfig shows all my interfaces just fine, and with the IP. "ipconfig getifaddr en1" works too. I am on a Mac if that makes any difference.


share|improve this question

it probably fails because you have no ip address on that interface. this is what happens i try to get the ip on en0 (ethernet) and en1 (wifi)

localhost:~ > ipconfig getifaddr en0
get if addr en0 failed, (os/kern) failure

localhost:~ > ipconfig getifaddr en1
share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.