Hi all, I come from a asterisk background and having trouble keeping the firewall hole opened up for Polycom registering to freeswitch server. I am running freeswitch ( with bluebox UI) and trying to register a Polycom behind a router. I have exhausted all the options in sip_profiles directory for the interface I am using. The issue I am seeing is that the freeswitch sends the OPTIONS message to the internal IP ie ( 192.168.X.X) rather than the public IP, behind which the Polycom phones are. These phones register fine with asterisk in the stated scenario. I have tried changing these options in the xml file but still the OPTIONS message ( as seen in tcpdump) is sent to 192.168.X.X <param name="nat-options-ping" value="true"/> <param name="all-reg-options-ping" value="true"/> <param name="apply-nat-acl" value="rfc1918.auto"/> <param name="aggressive-nat-detection" value="true"/> <param name="NDLB-force-rport" value="true"/> Any help appreciated !! .. Thanks in advance. Regards, Akhil