By default remote access from the Internet to the router is disabled.

Vigor Router
To allow remote access from the Internet, go to System Maintenance>>Management configuration menu page as shown below:

Select Allow management from the Internet and also select type of access required.
For additional security, you can add the IP addresses of only those PC’s you wish to have access to manage the router. These are added to the Access List.

Vigor3300V Router
To allow remote access from the Internet, go to System>>Access Control configuration menu page as shown below:

Select the required type of remote access required
Select required option for Management Access Control

For additional security, you can select Enable User Defined WAN IP and add the IP addresses of only those PC’s you wish to have access to manage the router.