I have a revision A1 625, with 1.09 firmware. While using FireFTP, I attempted to connect to a website's FTP server using SFTP. I didn't know that the server had recently switched to only requiring a passive mode connection. When I tried to connect via SFTP, I got a "server's host key is not cached in registry" error. I clicked yes to allow it to connect anyway. The connection failed, and immediately after, I could no longer load the web page from any browser on my computer. I tried the other computers on my network, and they could not connect either.
I've tried everything I can think of. Cleared cache/cookies, deleted the PuTTY SSH registry entry, tried every firewall setting in the configuration menu including setting my computer as a DMZ host, rebooting the router, and resetting the router to factory default. Nothing works, I still cannot load that one website from behind the router. All other websites work fine, and if I connect my computer directly to my cable modem, I can load the page fine. As soon as I reconnect the router, the page will fail to load. Don't know what else to try. Any help is appreciated.