Hello, This is my first post in this forum and forgive me if there is another post opened for the same issue. I have searched the forum but no luck. I had installed skype in our office 3cx as VoIP Provider and was working perfectly. Yesterday, we update our land line from ADSL to VDSL and our service provider supplied us with a new router. After line installation the 3cx server log, give us the below error for skype registration: Registration at Skype has failed. Destination (sip:*******************@sip.skype.com:5060) is not reachable, DNS error resolving FQDN, or service is not available. We have contact Service Provider technical support department and they inform us that 5060 port is reserved only for their sip traffic and advised us to create a port forward rule (outgoing port 5060 to incoming 5070 and destination the local ip of 3cx) for our 3cx and setup skype listen to 5070. The question is how to setup skype in 5070 from 3cx interface. The network details are: 3cx ip: 192.168.168.100 - Default gateway:192.168.168.2 Vigor (office router - all machines gateway except 3cx): 192.168.168.1 - Route Policy: Any packet send to 192.168.168.2 Service Provider router ip (for internet and sip): 192.168.168.2 Note that in 3cx we have installed 2 VoIP Providers, one for our Service Provider and the other for Skype. Thank you in advance!