To enable remote login / access via the WAN external IP on a Thomson Technicolor TG582n router, do the following:
- Log in to the router at https://192.168.1.254.
- Go to Toolbox -> Remote Assistance.
- Select ‘permanent’ (as opposed to ‘temporary’, which will disable remote access after router reset or 20 mins of inactivity).
- Optionally change the username. The default was ‘tech’.
- Optionally choose a password. By default it will create a random password.
- Enable.
You should now have a URL, username and password that allows you to login to the router from outside your internal network.