You are really confusing me with the blockouts... If they are DNS numbers, WHO CARES or can do anything. It is nice to be cautious, but you could be overdoing it. The MODS will protect you and remove anything you shouldn't post.
So I am confused as I don't know HOW that page works that you are showing? Like I said, I can NOT find a manual for that router... seems to be a special ISP issue. If you KNOW of a link to the manual, please post it.
What confuses me is that I see a 'SET' for a DSL ROUTER, 4 black lines through IP Addresses, which I assume are OTHER DNS's, and then the OPENDNS line.
If all these are DNS's, then ONLY the first one is in effect. I'll assume the first line means use the ROUTER to be your DNS server and then it will use the ONE underneath it. All DNS's have 2 IP addresses usually, one as the main one and another as a backup. Google uses 126.96.36.199 and 188.8.131.52 for instance, and my ISP has two.
If I *AM* correct, then you'll have to DELETE the ones above OPENDNS to use it. Again, understanding what the page is and how used would surely help, as would what those red x's are for, as well as the choices for DSLROUTER (what happens when you press SET?).