asterisk users - Jun 2009 - no sdp or contact replacement using externip

Hi all! Do anybody has a full working environment using externip on an asterisk
box behind a nat? I tried with two diferent boxes (Elastix-1.4.24 e
Trixbox-1.4.22-3)and the asterisk do not replace neither contact, neither sdp
headers info with the externip informed on sip.conf general parameters.

I used these two statements:

externip=XXX.XXX.XXX.XXX
localnet=192.168.200.0/255.255.255.0


Do anybody in list had those dificulties? That's strange because I could not
make this work on two diferent instalations! Trying hard to think about
what's missing.

Regards,

Ricardo.

Yes - we typically install behind NAT.  The issue will usually be your
firewall setup ...assuming you have setup your peers for NAT. 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Ricardo
Martins
Sent: Tuesday, June 16, 2009 9:40 AM
To: Asterisk Users List
Subject: [asterisk-users] no sdp or contact replacement using externip

Hi all! Do anybody has a full working environment using externip on an
asterisk box behind a nat? I tried with two diferent boxes (Elastix-1.4.24 e
Trixbox-1.4.22-3)and the asterisk do not replace neither contact, neither
sdp headers info with the externip informed on sip.conf general parameters.

I used these two statements:

externip=XXX.XXX.XXX.XXX
localnet=192.168.200.0/255.255.255.0


Do anybody in list had those dificulties? That's strange because I could not
make this work on two diferent instalations! Trying hard to think about
what's missing.

Regards,

Ricardo.


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On Tue, 16 Jun 2009, Ricardo Martins wrote:
> Hi all! Do anybody has a full working environment using externip on an 
> asterisk box behind a nat? I tried with two diferent boxes 
> (Elastix-1.4.24 e Trixbox-1.4.22-3)and the asterisk do not replace 
> neither contact, neither sdp headers info with the externip informed on 
> sip.conf general parameters.
>
> I used these two statements:
>
> externip=XXX.XXX.XXX.XXX
> localnet=192.168.200.0/255.255.255.0
>
>
> Do anybody in list had those dificulties? That's strange because I
could
> not make this work on two diferent instalations! Trying hard to think 
> about what's missing.
I have dozens of boxes doing it this way. All "just work".

Have you nat=yes in there too? Also you did port-forward from the router 
to the box as well, didn't you?

Often the router will have a broke SIP ALG which will get in the way too. 
Turn it off if you can.

Gordon