zxdgkjzdhfj wrote: Many thanks for that. I'm trying it now but the Gigaset has stopped displaying certain configuration pages. I set it to static IP so that the open port stays is fixed and I changed the Draytel account to use 5062 under Telephony Connections. Oddly now I can log into the Gigaset web interface and display most of the configuration pages but the Telephony Connections page just hangs. The page outline is there with the left hand menu but the configuration options in the body no longer appear. I might be doing a factory reset soon.

In principle though, if I don't want to use the POTS ports on the router is it still necessary to change the port and if so why?

@neptune, thanks. If your suggestion is different would you mind posting them here so future readers can benefit?

nealuk wrote: Also, for security, I'd suggest not using the default 5060 port, as there is quite a bit of probing directed at this port from the darker side of the net

Briain wrote: ...that's an Interesting suggestion about avoiding 5060 for a VoIP phone, but I was thinking, since the rule of thumb is to use 5060 then 5062, then 5064, etc, etc, for multi phone systems, wouldn't these will all be pretty heavily targeted, anyway? I guess that since most single phone VoIP systems will just be left on that default setting of using port 5060, it'll by far be the most frequently hammered port; is that your thinking behind the suggestion to avoid using it?...