[Serusers] ser: cannot call behind a Nat using rtpproxy

[Americania .it]

What should I do? Something to set ? Why if I use the asterisk server 
instead of the ser one and  the same voip clients (using users with the nat 
flag enabled) I can enstablish the communication without any problem ?

Should I open port 8000 on the router of the Lan ?

I 've attached the X-Lite Log when logging in :

---------------------


© 2005 CounterPath Solutions Inc. All rights reserved.
X-Lite release 1105x build stamp 21407
License key: B608ADE2A7C14E53835E7FF2EFAE95D0

Established SIP protocol listen on: 192.168.0.102:5060

NAT firewall type discovered is forced.

Discovered Symmetric NAT Firewall

SIP: 192.168.0.102:5060
RTP: 192.168.0.102:8000
NAT: 62.101.126.230

PROXY#0: 80.105.2.110:5060


SEND TIME: 1079327
SEND >> 80.105.2.110:5060
REGISTER sip:80.105.2.110 SIP/2.0
Via: SIP/2.0/UDP 
62.101.126.230:5060;rport;branch=z9hG4bK01C14B200F494466A016FE0E0E46B658
From: claudio <sip:claudio at 80.105.2.110>;tag=4251097143
To: claudio <sip:claudio at 80.105.2.110>
Contact: "claudio" <sip:claudio at 62.101.126.230:5060>
Call-ID: 4DAD46A40FE546019F15CFD05AAE23FD at 80.105.2.110
CSeq: 9157 REGISTER
Expires: 1800
Max-Forwards: 70
User-Agent: X-Lite release 1105x
Content-Length: 0


RECEIVE TIME: 1079425
RECEIVE << 80.105.2.110:5060
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 
62.101.126.230:5060;rport=39914;branch=z9hG4bK01C14B200F494466A016FE0E0E46B658
From: claudio <sip:claudio at 80.105.2.110>;tag=4251097143
To: claudio 
<sip:claudio at 80.105.2.110>;tag=2a08c327b8d597781b526eaf86695180.4235
Call-ID: 4DAD46A40FE546019F15CFD05AAE23FD at 80.105.2.110
CSeq: 9157 REGISTER
WWW-Authenticate: Digest realm="80.105.2.110", 
nonce="446f5b8ae893e0b8c2a781a06a5257a485ebe0b6"
Server: Sip EXpress router (0.9.4 (i386/linux))
Content-Length: 0
Warning: 392 10.0.0.133:5060 "Noisy feedback tells:  pid=13858 
req_src_ip=62.101.126.230 req_src_port=39914 in_uri=sip:80.105.2.110 
out_uri=sip:80.105.2.110 via_cnt==1"


SEND TIME: 1079427
SEND >> 80.105.2.110:5060
REGISTER sip:80.105.2.110 SIP/2.0
Via: SIP/2.0/UDP 
62.101.126.230:5060;rport;branch=z9hG4bKF82CE6FE2C624791B7ABF06D7B8E7BFD
From: claudio <sip:claudio at 80.105.2.110>;tag=4251097143
To: claudio <sip:claudio at 80.105.2.110>
Contact: "claudio" <sip:claudio at 62.101.126.230:5060>
Call-ID: 4DAD46A40FE546019F15CFD05AAE23FD at 80.105.2.110
CSeq: 9158 REGISTER
Expires: 1800
Authorization: Digest 
username="claudio",realm="80.105.2.110",nonce="446f5b8ae893e0b8c2a781a06a5257a485ebe0b6",response="91b05be86378bf515209116e96bd6314",uri="sip:80.105.2.110"
Max-Forwards: 70
User-Agent: X-Lite release 1105x
Content-Length: 0


RECEIVE TIME: 1079533
RECEIVE << 80.105.2.110:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 
62.101.126.230:5060;rport=39914;branch=z9hG4bKF82CE6FE2C624791B7ABF06D7B8E7BFD
From: claudio <sip:claudio at 80.105.2.110>;tag=4251097143
To: claudio 
<sip:claudio at 80.105.2.110>;tag=2a08c327b8d597781b526eaf86695180.d540
Call-ID: 4DAD46A40FE546019F15CFD05AAE23FD at 80.105.2.110
CSeq: 9158 REGISTER
Contact: <sip:claudio at 62.101.126.230:5060>;expires=1800
Server: Sip EXpress router (0.9.4 (i386/linux))
Content-Length: 0
Warning: 392 10.0.0.133:5060 "Noisy feedback tells:  pid=13858 
req_src_ip=62.101.126.230 req_src_port=39914 in_uri=sip:80.105.2.110 
out_uri=sip:80.105.2.110 via_cnt==1"

---------------------------------------


>
>Hi,
>probably the solution might be that your user agent in public will have to 
>re-register every minute or shorter time.
>It is because the NAT binding between SER and the public user will be 
>closed if there is no SIP traffic.
>
>Ladislav
>
>Americania .it wrote:
>>I've installed ser 0.9.4 on Suse 10 and it's running with mysql.
>>
>>I can register users (I'm using serweb) but I can only make a call from a 
>>user inside the Lan (where ser is installed) to a user outside behind a 
>>Nat (Fastweb network in Italy, Natted). If i call from this user behind 
>>Nat the call does not reach the other user. Viceversa it works fine.
>>
>>I installed the nathelper module and rtpproxy too.
>>
>>I don't know if I configured it well . Have I got to open some additional 
>>port in my router on the lan where ser is running (I opened port 5060 udp 
>>and tcp only)?
>>
>>I've tried to use Asterix on another pc in the same lan and I don't have 
>>this kind of problems with the some users and some clients (3cx phone).
>>
>>Any suggestions ?
>>
>>thanks
>>
>>
>>_______________________________________________
>>Serusers mailing list
>>serusers at lists.iptel.org
>>http://lists.iptel.org/mailman/listinfo/serusers
>>
>>
>