Recently been experiencing connectivity problems. Symptoms are similar to a DNS problem. Browser takes many seconds to display pages and shows a 'connecting to...' message on the message bar. If I ping a known address or use direct IP connection, to MySQL via ODBC I get instantaneous connection.
Discussed this with my ISP and we've eliminated their end. Trying to track it down, I discovered that this issue only seems to happen with Firefox, not IE. I've even tried manually entering my ISP's DNS settings in the network connection properties on my PC as well as the router.
I've tried a different firewall, and a clean install of Firefox.