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I have a DLink DSL-2520u ADSL2+ modem. When I access the page, it prompts for a username and password. Upon successful authentication, I see the modem configuration page.

If I am on a different network, I can also access the modems configuration via its public IP address.

How can I restrict access to the configuration page via the public IP address and only allow access via the internal IP address?

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up vote 1 down vote accepted

There is probably a modem configuration page for enabling/disabling "remote configuration" or "remote adminstration". This feature/selection might be under the "firewall" section. Normally this feature should be disabled (at least that's the default setting for my modem.)

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