[Freeswitch-users] Freeswitch as STUN server?

[Rupa Schomaker]

The two IPs are necessary to determine if this is a full-cone nat or not.
 From the RFC:

To determine if it's behind a full-cone NAT, the client can send a
   STUN Binding Request with flags that tell the STUN server to send a
   response from a different IP address and port than the request was
   received on.  In other words, if the client sent a Binding Request to
   IP address/port A/B using a source IP address/port of X/Y, the STUN
   server would send the Binding Response to X/Y using source IP
   address/port C/D.  If the client receives this response, it knows it
   is behind a full cone NAT.


I guess it isn't strictly required, but you won't be able to support all
stun requests and nat topologies if only bound to 1 public IP.

On Wed, Nov 3, 2010 at 7:02 PM, Brian May <brian at microcomaustralia.com.au>wrote:

> On 4 November 2010 02:15, GillesToo <codecomplete at free.fr> wrote:
> > So I was wondering if Freeswitch could run as STUN server or if someone
> knew
> > of a good open-source STUN server that I could install on the same host
> as
> > the Freeswitch server?
>
> Debian has this package:
>
> scrooge:~# apt-cache show stun
> Package: stun
> Priority: optional
> Section: net
> Installed-Size: 176
> Maintainer: Debian VoIP Team <pkg-voip-maintainers at lists.alioth.debian.org
> >
> Architecture: i386
> Version: 0.96.dfsg-5
> Depends: libc6 (>= 2.6-1), libgcc1 (>= 1:4.2-20070516), libstdc++6 (>=
> 4.2-20070516)
> Filename: pool/main/s/stun/stun_0.96.dfsg-5_i386.deb
> Size: 41292
> MD5sum: b8d9baaddbaf74016b6a0af3bdfd8545
> SHA1: 8675d417af0e2d9076e91e46a82a99e3e728d45e
> SHA256: ccb8fc9ad634b2ff98ebcc5d97eb2864df8a1c634109ef2fb641a7d2a2fb3a34
> Description: Server daemon and test client for STUN
>  The STUN protocol (Simple Traversal of UDP through NATs) is described in
> the
>  IETF RFC 3489, available at http://www.ietf.org/rfc/rfc3489.txt.  It's
> used to
>  help clients behind NAT to tunnel incoming calls through. This server is
> the
>  counterpart to help the client identify the NAT and have it open the
> proper
>  ports for it.
>  .
>  Homepage: http://www.vovida.org/applications/downloads/stun/
> Tag: interface::commandline, interface::daemon,
> network::{client,server,service,vpn}, protocol::{ip,udp,voip},
> role::program, scope::utility, use::transmission
>
> === cut ===
>
> Unfortunately the version in Debian/lenny seems to have this brain
> dead assumption that you want it to bind to exactly two different IP
> addresses (for increased reliability or something). I don't have any
> additional public IPv4 addresses to spare.
>
> At least that was the problem I encountered when I installed it
> before. I might have been doing something wrong.
>
> Also the home page mentioned above is useless.
> --
> Brian May <brian at microcomaustralia.com.au>
>
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-- 
-Rupa
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