so i try toÃÂ explain in short what is the problem.
My OS is WinXP SP2, and my computer ir firewalled from outside, i'm running Microsoft Firewall Client for ISA server.
My RTC client connects to the server over SIP protocol, registering, and after it is registered i can make calls such like PC-to-PHONE. The source of my RTC client you can find there: http://ausroma.projektas.lt/temp/Source.txt
it works fine when i connect to PBX sip server which is in our internal network, but i can't connect when i try to connect to the server which is outside firewall....
i have another SIP client (X-Lite): http://ausroma.projektas.lt/temp/x-lite.JPGÃÂ and it works fine (register succesfully) when ISA firewall is enabled on my PC (when i disable ISA this client can't connect and i have registering time-out). I sniffed some packets, when ISA is enabled, and x-lite client connects succesfully: http://ausroma.projektas.lt/temp/xlite_sniff.JPGÃÂ how we can see, there is sending requests, and we recieve respons
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