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) I learnt that Some IOS versions will even crash on SIP behind NAT. See ..

Hi all

(1) Pls I need someone to explain port forwarding i.e. forwarding a udp port to a specific host .Can Natting be used?

(2)Secondly what is SIP NAT traversal? What is the effect of turning it off?

(3)I have natting configured on my router if I issue the following command ,will it affect the preconfigured natting ?the commands are

no ip nat service sip tcp port 5060

no ip nat service sip udp port 5060

(4) I learnt that Some IOS versions will even crash on SIP behind NAT. See

http://lists.digium.com/pipermail/asterisk-users/2004-January/033718.html.

pls go through this link and pls advise .

(5) Which command can use in natting to forward

Forward UDP Port 5060-5082 to 192.168.1.4

Forward UDP Port 10000 to 20000 to 192.168.1.4

I use Cisco 1700 series router

I am using the above port for VoIP solution in asterisk .

Thanks

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Re: ) I learnt that Some IOS versions will even crash on SIP beh

SIP Security Overview:

Cisco voice-over IP (VoIP) infrastructure solutions such as the Cisco Global Long Distance solution (see www.cisco.com/go/telephony ) feature a voice-over-packet network design, using SIP to provide telephony services.

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