I've got cable internet from Comcast into a Linksys WRT54G v2 wireless router with 2 PCs connected via ethernet and the new laptop via wireless. My signal strength isn't great in the far reaches of the house so on a whim I put DD-WRT's firmware on my router to try and boost the signal power. That's v23 SP1 final.
For security I'm using WPA Pre-Shared Key with the TKIP algorithm. I'm also running ZoneAlarm on the laptop, but was having the same issue earlier with Windows firewall.
So onto the problem... I'll be browsing, then suddenly I'll start getting "Page cannot be displayed" errors. Signal strength is still fine, and I get normal results when I ping the router. But no web browsing. Then suddenly things will work again of their own accord. Down times seem to range anywhere from minutes to hours.
Any brilliant thoughts?