Just having some trouble with a Draytek 2130. Just put a phone system in to a site and they had one of these at their main branch. Our system has a feature called SP-NET which is just a linking protocol Samsung use to link multiple PBX's. It doesn't use standard SIP but rather a group of ports for doing the different jobs. Mainly 6000 for signalling/call setup, 6100 for the BLF's and trunk selection and then ports 30000-30031 for the RTP.
Now it seems the that call is being set up. I see that progress no problem. But the issue is there is no RTP getting back in to the system on the main end.
I have put an 'allow all' rule in to the access control list just to see if it makes a difference but it doesn't seem like it. Is there somewhere else I can get the the firewall rules? Maybe on the CLI?
Any help much appreciated.