NAT Traversal

[Girishdharmaraj]

Guys
Any one has tried to use NAT traversal ? My SBC is on public IP and the IP phones is behind NAT. When the IP phone sends RTP from the NAT'ed Public IP, SBC drops with ICMP port unreachable.
If i use ALG or STUN on the device to advertise the public IP on SDP it works.
Any idea ?

[lmorissette]

In the NAP configuration, there is a setting to support remote NAT. Try this:
NAP -> [Select the NAP] -> Network Address Translation (NAT) -> Remote Method for RTP: Force Passive Mode

You can check here:
https://docs.telcobridges.com/tbwiki/Toolpack:SIP_Configuration_For_Remote_Symmetric_NAT_Traversal_A

[Girishdharmaraj]

Hi support,

Yes i have enabled that, and still does not work.

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