Dangerous Router-Eating Worm

[#1]

http://www.samknows.com/broadband/news/dangerous-router-eating-worm-discovered-in-australia-535.html
looks like its time i changed my router password to a none dictionary word as well as my wireless.

[#2]

And make sure that you can not login to control it via the internet side.

[#3]

This is something I once enabled on a D-Link router for a specific issue I had - but can't for the life of me find out how to remove the ability to. I'm imagining that I would have secured it to my IP address at home, so only I could administer it, but I can't be certain, since I can't find the darned option.
Any ideas anybody?
Its a D-Link DSL-G604T

[#4]

remote mangment is allways off on my router.
does any one know how to change the user name on the dg834g v4's