<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">there are really only 2 challenges to this:<DIV><BR class="khtml-block-placeholder"></DIV><DIV>1. IPC has to know which local address to use when it sends openreceivechannelack to CM indicating what IP:port IPC would like to receive audio on (sorry for ending sentence with preposition). This is achieved either by manual config or using a 'reflector page' - basically a web page the client can access on the CM server that displays the source IP address of the http get request. An example one is included with the old IP Softphone Admin Kit</DIV><DIV><A href="http://www.cisco.com/cgi-bin/tablebuild.pl/ip-softphone">http://www.cisco.com/cgi-bin/tablebuild.pl/ip-softphone</A></DIV><DIV>IPC specific discussion:</DIV><DIV><A href="http://www.cisco.com/en/US/customer/products/sw/voicesw/ps5475/products_administration_guide_chapter09186a00805f085a.html#wp1067624">http://www.cisco.com/en/US/customer/products/sw/voicesw/ps5475/products_administration_guide_chapter09186a00805f085a.html#wp1067624</A></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>2. if the VPN software has a builtin stateful firewall it has to allow the IPC to open and receive traffic on the TCP ports for signaling and UDP ports for media. I believe IPC allows you to fix the port number to be used for RTP traffic in the latest versions.</DIV><DIV><A href="http://www.cisco.com/en/US/customer/products/sw/voicesw/ps5475/products_administration_guide_chapter09186a00805f085a.html#wp1053356">http://www.cisco.com/en/US/customer/products/sw/voicesw/ps5475/products_administration_guide_chapter09186a00805f085a.html#wp1053356</A></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>/Wes</DIV><DIV><BR><DIV><DIV>On Mar 30, 2006, at 5:12 PM, Craig M Staffin wrote:</DIV><BR class="Apple-interchange-newline"><BR><FONT size="2" face="sans-serif">Has anyone gotten IP Communicator to work through a Checkpoint VPN/Firewall solution??</FONT> <BR> <BR><FONT size="2" face="sans-serif">Craig<BR> <BR> </FONT><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">cisco-voip mailing list</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</A></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</A></DIV> </DIV><BR></DIV></BODY></HTML>