Blocking those domains would be certainly nice actually, but I wasn't able to do so even with administrator rights! I did check every single setting related to IP configuration or managing without success. Maybe my knowledge is not enough or simply I just skipped it, so I would deeply appreciate if you could do a fast check about it. You can find here screenshots and descriptions for every option in my router here.
Moreover, my solution wasn't perfect in the end as my telephony service didn't work though the WiFi did properly, so it looks that it's going to take a little longer! Any advice, options or guidance is welcomed and appreciated!
Wierd... I suppose one thing I would try is contacting your ISP at some point to see what their policy on 3rd party DNS programs is, and if they'll let you use your own. Until then, I'll look through the settings you posted and see if I can find anything