[Serusers] Is RTPproxy needed even when there is a Cisco PIX?

Jiri Kuthan jiri at iptel.org
Fri Jul 14 14:30:04 CEST 2006

That's actually a deep architectural observation with which I can only
wholeheartly agree.


At 21:40 13/07/2006, Richard Z wrote:
>All SIP ALGs are broken one way or another. PIX is not an exception.
>It is just impossible to keep up with all types of SIP messages and
>headers and usages of the phones. It really depends on how you use the
>phones. It might or might not be a problem for your particular use. My
>experience is that rtp/mediaproxy is far more reliable than PIX.
>On 7/12/06, Ricardo Carvalho <rcarvalho at iric.up.pt> wrote:
>>I'm deploying a VoIP server using SER and I would like to know if I need
>>to install RTPproxy (or Mediaproxy), because the network where the
>>server will be placed already has a Cisco PIX 515E which has this
>>feature that analyses headers of SIP messages and I suppose that
>>rewrites them to avoid NAT problems.
>>Serusers mailing list
>>Serusers at lists.iptel.org
>Serusers mailing list
>Serusers at lists.iptel.org

Jiri Kuthan            http://iptel.org/~jiri/ 

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