Obviously not a DNS error.
Maybe my ISP has just blocked it for some unknown reason?
( Prequal This is serious business. Very serious., Wed 1 Jul 2009, 12:15, archived)

Sounds more like your ISP might have routing issues
Is it a large company?

Regardless of size, see if their tech support might be willing to forward your issue to their network people (after they have you wipe your harddrive and reload your operating system of course)
( PedroHin Once again cheated death on, Wed 1 Jul 2009, 12:23, archived)

Irish company. Reasonable sized. Never had issues like this before.
To be honest, I suspected it was an ISP problem, I just wanted some more technical people, such as yourself, to suggest issues with my machine before I got involved with tech support.

Formatting hard drive as we speak :)
( Prequal This is serious business. Very serious., Wed 1 Jul 2009, 12:28, archived)