Active mode FTP client programs cannot access an FTP server from behind Internet Security and Acceleration Server 2004

Troubleshooting FTP access problems leave many ISA Firewall admins bald from tearing their hair out trying to find a solution. Here’s a great KB article on a specific cause of FTP problems related to the Firewall client.

Check it out at:



Thomas W Shinder, M.D.


Email: [email protected]

MVP — Microsoft Firewalls (ISA)

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