Could not connect to C&C Generals Zero Hour Online

The official servers went down some time ago! Did you already try http://cnc-online.net/ or Gameranger?

@bumsbums123

Generals, Zero Hour, C&C3, Kane's Wrath and Red Alert 3 all used the Gamespy system for their online play, but the whole system has been shut in July 2014.

However, as FunkyFr3sh said, community servers have already been set up, so it should be possible to play online that way. More information on that can be found at http://cnc-online.net/