Security in VoIP Network

[alex_vishnev]

Hello All,

I heard that Cisco PIX firewall is now capable of dynamically openning/closing pin-holes in the firewall to allow dynamic rtp/rtcp port negotiation. First question, is this true? can someone point me to the information on this or other sites?

[lisa.hall]

The release notes for the 5.2 platform talks about the new sip_media timeout option for rctp at:

http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_v52/pixrn521.htm

You might also want to take a look at the option in the command reference at:

http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_v52/config/commands.htm#xtocid1604973

Hope this helps!