New Windstream Modem blocks World of Warcraft?

My girlfriend and i just got the newest all-in-one router/modem from windstream yesterday. Our internet works great. No issues there. We can surf the web all day with no problems. Whats wierd is it will allow us to download patches for World of Warcraft but won't let us login and play the game. Our login screen times out every time on both our computers saying it's unable to connect. I have found though if i reset the modem and go through the whole painful reactivation process which takes about 10 minutes, we can actually get in the game for a short while before it blocks or disconnects us or what ever it's doing to us again. It would seem to me that if we can't login to WOW our internet would be down but it's not, or the WOW server would be down but it's not. What ever is causing it has to be something to do with this new rounter/modem. Anyone have simular issues or know whats causing this and how i can fix it?|||modem don't block ur SP may block, but I think it's a firewall r a anti virus problem%26gt;:) Viola|||this sounds like a permissions issue. you will probably have to go into your router via your computer and set its permissions for WoW to allow it. I don't know this brand so I am not sure how you would go about it. all i know is for some reason your router is seeing WoW as a problem and blocking it. so you know routers can and do work as firewalls. they are just a hardware based firewall. that is why you need to go into it and set its permissions to allow it.