Forwarding Multiple Ports - Cisco 877

Unanswered Question
Aug 13th, 2009

Hi all, is it possible to specify a range of ports to be NAT'ed on a Cisco 877 router? e.g If you have a VoIP setup and you want to forward 50 RTP ports, can you do this with one IOS commnad?

Thank you.

I have this problem too.
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Paolo Bevilacqua Thu, 08/13/2009 - 04:04

No, you cannot specify a range.

That is rarely necessary, because the router is smart enough to dynamically create NAt translations based on the signaling, SIP or otherwhise.

Paolo Bevilacqua Thu, 08/13/2009 - 15:29

You may be very well right, sorry for saying otherwise.

Still, you shouldn't need any explicit statement like that due to SIP-ALG feature in IOS.

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