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Activating Passive FTP Mode
http://www.softwaretipsandtricks.com/windowsxp/articles/340/1/Activating-Passive-FTP-Mode
Super Admin
 
By Super Admin
Published on 02/24/2005
 
If you have problems connectiong to FTP servers using Internet Explorer when your computer is behind a firewall, you need to enable passive mode so you can connect a different way.

Activating Passive FTP Mode

1. In IE6 XP open the Tools tab -> go to Internet Options -> Advanced tab -> scroll down till you find "Use Passive FTP (for firewall and DSL modem compatibility)" -> TICK this setting -> hit Apply

This should resolve all problems with accessing FTP servers.