I'm having a VERY bizarre problem with my internet connection: While my modem is syncing up 100% of the time and both my router and my computer's NIC (if connected directly) can pull an IP address just fine, every 90 minutes or so DNS will stop resolving for about ten minutes at a time. This has been going on for about a month now. I can't ping domain names when this happens, but then again pinging IP addresses doesn't work during these downtimes either.
As if this isn't unusual enough, it gets worse: If I connect my modem directly to my computer's NIC during these down periods, I can't connect at all. If I'm behind my router, resetting the router will cause DNS to start resolving again for 10-20 seconds. After this started I tried switching to free DNS servers (220.127.116.11 and 18.104.22.168) but this changes nothing. The router trick worked before and after I had the router switch to the alternate DNS server.
My ISP is Cox, and while I believe they support this issue at the Tier 2 level (the DNS, not the router, and that's as long as you're not a fast connect in the first 30 days) hold times have been long when I called and I want to see if I can resolve this on my own (with you guys'/ladies' help of course
P.S.--When being the router, my other computer on the wireless can't connect during the downtimes either, and the router reset thing works for the wireless computer as well.