Flush DNS cache

To flush you DNS Cache: ipconfig /flushdns sudo lookupd -flushcache dscacheutil -flushcache
 * on MS Windows click Start->Run, type in cmd and press Enter, then type:
 * on Mac OSX Tiger (10.4): open Terminal and type:
 * on Mac OSX Leopard (10.5) - no sudo necessary! - open Terminal and type: