SKY Gigabit Broadband --> blocking SIP/VoIP traffic
Dear community:
I have been Sky customer for several years. Until last Friday 11th of Jan 2019 I used to have normal fiber (up to 90Mb) --> IPv4 only, had connected via Ethernet cable a VoIP phone working smoothly for two years. On Friday 11th after upgraded to Gigabit Broadband, the SIP phone stopped to work with the error "cannot register the account".
After so many tests, I noticed the same account registered via soft-phone (Zoiper) connecting with no issues via 4G however, not registering on the mobile phone when using the WiFi connection. I configured correctly -several times- the Port Forwarding at the Sky SR200 router to allow inbound and outbound connection for both UDP and TCP traffic on ports 5060 and 7060 (creating the service > adding the firewall rule > rebooting the router): nothing, same result: does not work. Spent hours with the technical support team = not helping at all (I think they were clueless).
They kept saying this has to be done at router level (I configured the ports at LAN level several times), when scanning the ports of the dynamic IP from the outside, most of the ports are closed at WAN level. I am very suspicious that this is happening because IPv6 is enabled at WAN level (router as well --> disabled firewall and yet could not see the ports opened from the outside). They denied to disable IPv6 in the WAN and, even thought they confirmed the ports are opened, that is not true: continue closed.
Looks like Sky will not help with this kind of issues. If that's the case, I would fully recommend anyone using VoIP/SIP phones do not get Sky Gigabit Broadband because it simply won't work and the technical support team will make you waste your time with no solution.
If anyone here have seen this issue, much appreciated if you share your thoughts to explore another solution before just giving up and dropping this provider.
Many thanks,
Enrique.-
