Re: NAT-PMP not honoring requested external port
Re: NAT-PMP not honoring requested external port
- Subject: Re: NAT-PMP not honoring requested external port
- From: Jens Alfke <email@hidden>
- Date: Wed, 11 Jun 2008 16:52:48 -0700
On 11 Jun '08, at 1:45 PM, Duane Murphy wrote: At that point, it sounds like you've just about reinvented STUN <http://
www.ietf.org/rfc/rfc3489.txt>.
No, this is not like STUN. I'm not using UDP, and I'm not trying to poke a hole through the NAT. This all runs over TCP sockets, and I'm using NAT-PMP or UPnP to ask the NAT to open a port.
If you want to know what I'm doing, this blog post is a good place to start: although the series begins a few posts earlier:
The catch is if both ends are behind NAT firewalls, you'll need a non-
NAT service that can be used to kickoff the NAT port acquisition. No, I just ask the NAT to open a port for me. (I am willing to sacrifice compatibility with NATs that don't support this; these days, most of them seem to. I'd rather not mess with stuff like STUN or Bryan Ford's TCP-compatible hole-punching technique.)
—Jens |
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