[RTP] How to check if NAT router knows what ports to open?

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Subject	Author	Date
[RTP] How to check if NAT router knows what ports to open?	Vincent Delporte	12-08-2006

Posted by Vincent Delporte on December 8, 2006, 11:02 am

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Hi

I'm wondering how to check if a NAT router is SIP-friendly, ie. it can
analyze SIP packets sent from the client to the other side?

Should I look for UPnP, if indeed that's the indication that a NAT
router can open incoming ports dynamically? The reason I ask, is that
I have a Netgear router connected to an ADSL modem, with UPnP
activated... but I still had to map ports for SIP clients inside to
carry conversations.

Thanks.

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