Peter, you have the same addresses as I do. When I had this problem a month or so ago, it turned out to be a Norton systems bug at those addresses, that they corrected. I think your order is correct, tactically....reboot the router and if that fails, turn off malicious site blocking within the router.
However, you might have another problem, as I just went to cnn.com and got through no problem. Since we both have the same IP @s, it doesn't make sense that it would blcok you and not me. Hopefully someone on KatieQ's team will get back to you with a response.