Firewall blocks FTP PASV response

Posted by harper on Super User See other posts from Super User or by harper
Published on 2010-12-21T07:05:06Z Indexed on 2010/12/21 7:56 UTC
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windows-7

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windows-vista

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ftp

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firewall

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down vote favorite I have an FTP server that supports passive server mode (using PASV command). This works fine with Windows XP. When I want to access this server from Windows Vista or Windows 7 with firewall enabled I experience a immediate connection shutdown. A reset packet is sent to the server, the socket is signaled that the server had reset the connection (what is not true).

The problem disappears when the firewall is disabled.

Connections to other FTP servers work correctly. The difference is that the servers response to PASV does not enclose the address field with parentheses. This is legal as documented in RFC-959 and RFC-1132.

How can I configure the firewall to stop this bad behavior?

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