NAT Transversal

xdgning · Post by **xdgning** » Tue Dec 11, 2007 10:30 am

1. Brekeke Product Name and version:

2. Java version:

3. OS type and the version:

4. UA (phone), gateway or other hardware/software involved:

5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/ ... terns.html :

6. Your problem:

I have 2 identical VoIP boards, each under the LAN of a router. Board #1 is under D-Link WBR-2310 router (Router #1). Board #2 is under Belkin F5D7230-4 (Router #2). WAN ports of both routers are under the same network as BSS. I have opened port forwarding for both routers.

The problem is that the 2 boards register differently. UA1 on Board #1 is registered with its on LAN ip and UA2 on Board #2 is registered with Router #2's WAN ip. When UA2 call UA1, UA1 has to answer within 1-2 rings, otherwise the call would be automatically cancelled. It seems ok when UA1 call UA2.

Is there any settings on the router to solve this problem?

Thanks.

peng · Post by **peng** » Tue Dec 11, 2007 3:44 pm

It is interesting.
Can you use wireshark and paste the packets here?

xdgning · Post by **xdgning** » Tue Dec 11, 2007 4:50 pm

Below are the packets captured from Ethereal. Can we upload anything here?

No. Time Source Destination Protocol Info
6 3.156388 67.112.247.203 67.112.247.205 SIP Request: REGISTER sip:67.112.247.205
7 3.156979 67.112.247.205 67.112.247.203 SIP Status: 100 Trying (0 bindings)
8 3.176280 67.112.247.205 67.112.247.203 SIP Status: 200 OK (1 bindings)
16 8.771419 67.112.247.202 67.112.247.205 SIP Request: REGISTER sip:67.112.247.205
17 8.771999 67.112.247.205 67.112.247.202 SIP Status: 100 Trying (0 bindings)
18 8.776196 67.112.247.205 67.112.247.202 SIP Status: 200 OK (1 bindings)
26 15.189564 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
27 15.200274 67.112.247.203 67.112.247.205 SIP Status: 200 Ok
44 27.202656 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
45 27.218924 67.112.247.203 67.112.247.205 SIP Status: 200 Ok
61 39.201146 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
62 39.217491 67.112.247.203 67.112.247.205 SIP Status: 200 Ok
78 51.199638 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
79 51.216022 67.112.247.203 67.112.247.205 SIP Status: 200 Ok
84 52.566453 67.112.247.202 67.112.247.205 SIP/SDP Request: INVITE sip:500@67.112.247.205, with session description
85 52.567178 67.112.247.205 67.112.247.202 SIP Status: 100 Trying
86 52.577228 67.112.247.205 67.112.247.203 SIP/SDP Request: INVITE sip:500@192.168.1.5:5060;transport=udp, with session description
87 52.606604 67.112.247.203 67.112.247.205 SIP Status: 100 Trying
88 52.611037 67.112.247.203 67.112.247.205 SIP Status: 180 Ringing
89 52.637168 67.112.247.205 67.112.247.202 SIP Status: 180 Ringing
102 63.197893 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
103 63.214646 67.112.247.203 67.112.247.205 SIP Status: 200 Ok
119 74.779190 67.112.247.202 67.112.247.205 SIP Request: CANCEL sip:500@67.112.247.205
120 74.780052 67.112.247.205 67.112.247.202 SIP Status: 200 OK
121 74.780194 67.112.247.205 67.112.247.203 SIP Request: CANCEL sip:500@192.168.1.5:5060;transport=udp
122 74.790212 67.112.247.203 67.112.247.205 SIP Status: 481 Dialog/Call/Transaction Does Not Exist
123 75.197914 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
124 75.213167 67.112.247.203 67.112.247.205 SIP Status: 200 Ok
140 87.194894 67.112.247.205 67.112.247.203 SIP Request: OPTIONS sip:500@192.168.1.5:5060
141 87.211866 67.112.247.203 67.112.247.205 SIP Status: 200 Ok