I have numerous VLANs in the network and I've a SIP server placed in the main VLAN. I'm using Office Communicator as a SIP messenger and I've setup ASL 6.04 to act as transparent SIP proxy.
As I set up the SIP proxy on firewall with default RTP values, it worked excellent, I reduced the number of RTP ports to 100 ports only between 1600 to 1700, it still was running fine. I then initiated my IP phones and they were giving some distortion and the moment I reduced the ports to 3 from 100 range, proxy stopped working.
Now I have restored the RTP ports to default numbers but when the audio communication starts, I see all the UDP ports defined in the RTP default allowed ports being dropped which shouldn't happen. My SIP proxying has stopped working as such that I can't get the audio streaming to work anymore on my communicator. Tried the packet filtering rules as well, I even disabled and then enabled the proxy configuring it right from the scratch but ain't happening, any ideas?
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