Have you correctly forwarded these ports on the cable modem? Since the cable modem is authenticating and getting the IP from the provider it should forward the ports at the Zeroshell and then Zeroshell to the sip server.
Routing and Bridging Firewall Solutions
Have you correctly forwarded these ports on the cable modem? Since the cable modem is authenticating and getting the IP from the provider it should forward the ports at the Zeroshell and then Zeroshell to the sip server.