At some point earlier today, I lost the ability to connect to a site via my wireless network, powered by an Airport Express.
When I try to load the page in Chrome 23 and Safari 6.0.2 on a MacBook Air and an iMac, I get their generic "Chrome Cannot Connect" and "Safari Can't Open the Page" messages.
I get the same errors on an iPad and iPhone when connected to the wireless network. However, if I disable Wi-Fi on my iPhone and try to access the site using the AT&T 3G network.
If I disable Wi-Fi on my iPhone and try to access those sites using the AT&T 3G network.
To try to resolve this, I have shut down and restarted all devices (OS X and iOS) and then unplugged my cable modem and my Airport Express for 20+ plus minutes.
Any other thoughts?