[Asterisk-Users] SIP Proxy Problem (NAT Environment)

[Michael Shuler]

Make sure you have nat=yes for the sip.conf entry for SIPGATE.
 
 

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Michael Shuler, C.E.O.
BitWise Systems, Inc.
1301 W. Pioneer Parkway
Peoria, IL 61615
Office: (217) 585-0357
Cell: (309) 657-6365
Fax: (309) 213-3500
E-Mail: mike at bwsys.net
Customer Service: (877) 976-0711 

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Markus
Miertschink
Sent: Tuesday, April 06, 2004 10:09 AM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] SIP Proxy Problem (NAT Environment)



I have the problem calling from a NAT firewalled SIP Phone to sipgate.de.
Somehow it is working. The connection works. Everything seems to be fine. I
could talk to the external phone. But: the external voice gets not
transmitted to my internal (calling) phone.

 

Calling inbound from SipGate to the same phone works perfectly. Both
channels are perfectly "proxied".

 

The * is used as a proxy and registered the sipgate account.

 

This way works:

 

SIPGATE ----->NAT(IP0)------>Asterisk(IP1)------->IP-Phone(IP2)

 

This not (partially):

 

SIPGATE<----NAT(IP0)<-----Asterisk(IP1)<-----IP-Phone(IP2)

 

All ports are mapped to the address of IP1. If I look into the tcpdump log
it seems that all ports used there are matching my NAT settings. Asterisk is
happy. No problems.

I only run into immediate abortion of the call if Asterisk is configured
using outbound_address with the ip of IP0.

 

I have no clue what to do anymore.

 

Regards,

Markus

 

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