My first thought is that you might have a DNS issue - i.e. your browser can't get to those sights because it can't resolve the domain name by address. With many routers, I've resorted to hard-coding the ISP's DNS server(s) addresses into your IP settings in the IP protocol configurations under Windows.
First, I would try DIRECTLY connecting your PC to your Comcast cable modem (bypass the Linksys router altogether). In these configuration, are you able to browse the Internet with Firefox or IE or WHATEVER? If you CAN, then there's likely an issue with the way in which the router is passing on IP configuration information from the Comcast modem to the PCs (wireless or wired) connected to it.Removed information regarding P2P, as it is against our TOU
It may be as simple as determining your Comcast's DNS server(s) IP address and assigning it manually on each PC in order to get your browsers working correctly. I use Comcast here and my DNS servers are:
Linksys has a pretty decent support site when it comes to configuring particular applications. Go to:http://www.linksys.c...d=6187941396B10
Check this out first. If this doesn't help, post a reply to this thread and I'll attempt to steer you in the right direction.
- John Hook