Server Fault is a question and answer site for system and network administrators. 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

Is there another method of auto-port forwarding, in case for some reason a user doesn't have uPnP enabled on the router? For programs like Skype, or IRC, how do they do it?

share|improve this question

closed as off topic by womble, Holocryptic, Zoredache, mdpc, Scott Pack Dec 6 '12 at 17:29

Questions on Server Fault are expected to relate to server, networking, or related infrastructure administration within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

up vote 1 down vote accepted

Take a look at hole punching technique.

share|improve this answer
Hm.. Very interesting read, thank you. – Drise Jul 30 '11 at 18:12

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