Hello all ,
For symmetric NAT traversal , I tried my VoIP client with some free SBCs (termed as Out bound proxies also )
I could register with them and even call is established but there was no voice behind Symmetric NAT.
1. In the source code I am sending all my packets (sip as well as rtp) to SBCs's IP & port
We are using same socket to send/recv rtp packet. It this enough ?
2. Do I have to do anything additionally ?
3. With the same set up X-lite(xten) worked , but our s/w could not .
4. we have compared x-lite packets with ours, they are very same.
When we sniff packets at our ISP we could see packets coming in but our Symmetric NAT -router might be dropping them .
If router blocks some traffic because of its symmetric Nature dose it respond with ICMP error messages ? how do i know that my router is dropping (specially when my router is a old and low end )
This is happening even if we are using a SBC.
Our logic :
1.Check NAT type
2. If it is Symmetric NAT
Send local IP & media port in SDP.
Use SBC IP & port while sending anything (sip/rtp)any guess what is going wrong ?
Please HELP !!!!!
regards
vikram _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
