[cisco-voip] problem for Cisco 7912 ip phone behind pix firewall

[sekchye goh]

Hi Voll,

   the fixup protocol was already configured but we still face the same problem.
Any further pointers will be greatly appreciated .  Thanks!

PIX# sho run | include fixup
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol ils 389
fixup protocol pptp 1723
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69



On Fri, 24 Dec 2004 09:03:36 -0800, Voll, Scott <Scott.Voll at wesd.org> wrote:
>  
>  
> sounds like maybe a fixup protocol on the pix? 
> 
>  ________________________________
>  From: cisco-voip-bounces at puck.nether.net on behalf of sekchye goh
> Sent: Thu 12/23/2004 8:22 PM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] problem for Cisco 7912 ip phone behind pix firewall
> 
>  
>  
> 
> Hi there!
> 
>    We have two cisco 7912 ip phone using SIP firmware behind PIX
> firewall.  These two phone is configured to register to a SIP proxy on
> the public Internet.  This SIP proxy is using SER
> (http://www.iptel.org/ser/).  These two Cisco 7912 ip phones are PAT
> to a single IP.
> 
>    The problem we have is when these two phones call each other, the
> two party cannot hear each other voice.
> 
>    If we replace the PIX firewall with a Cisco router, there is no such
> problem.
> 
>   Does anyone encounter this problem before?  I am clueless on how to
> resolve this problem.  Any pointers will be much appreciated.
> 
>    Thank you very much!
> 
> Best regards
> 
> sekchye
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