I am trying to access the vigor web interface for my router remotely, I can reach the initial login page but will not login with my login details. I can connect to a remote machine to edit the router settings. This was working about a month ago and as far as i can see there has been no changes made on the router that would affect this.

If you have dynamic ip & get a reboot or disconnection then the ip will change so maybe you trying to access another vigor?

Maybe the vigor has been reset for a reason so try the default passwords

Maybe you are trying with wrong letters ... make sure capital is off or on depending & no other language are on the keyboard you trying to log in

The IP on the router is static
I can access the router from a machine on site
I'm trying the correct details as they are the same as the ones I used to connect on site.

--SOLVED--
Under System Maintenance > Admin Setting there was an option to "Enable Admin Login From Wan"