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425 Possible PASV port theft, cannot open data connection

Posted on 2008-10-14
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Last Modified: 2012-06-21
I'm trying to connect to a Mac OSx FTP server using Filezilla and keep getting the above error
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Question by:HKFuey
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Expert Comment

by:olivierbreuer
ID: 22722150
Hello,

The PASV mode on a ftp transaction execute itself on the port 20, not the port 21. SO you have a problem to open the port 20 from the FTp server to Filezilla. Are you on a local lan or behind a firewall, a router, ???

Regards,

Olivier
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Assisted Solution

by:dpk_wal
dpk_wal earned 100 total points
ID: 22722355
Hi I am not 100% sure if this is a server or configuration issue on the router; can you try using some other client; or may be from the command prompt; or might be using some browser.

While googling, I found the link below:
http://forums.macosxhints.com/archive/index.php/t-23213.html

A not related link as below:
http://lists.apple.com/archives/Macos-x-server/2003/Jun/msg00738.html

Thank you.
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Author Comment

by:HKFuey
ID: 22722497
Hi Oliverbrewer,
I am behind a Vigor router.
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Expert Comment

by:olivierbreuer
ID: 22722647
I think the cause is your VIGOR router/NAT device not handling passive mode commands correctly.
Have you the opportunity to try with a different equipment ?

Regards,

Olivier
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Author Comment

by:HKFuey
ID: 22722678
You could be right, it works ok on an old Netgear router but I need the Vigor (which is new) for remote access.
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Expert Comment

by:olivierbreuer
ID: 22722931
So you have three choices to resolve your problem:

1. Try to upgrade the firmware of your vigor
2. Open a ticket on th Vigor web site
3. change your Vigor with a different brand who supports your needs...

Regards,

Olivier
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Author Comment

by:HKFuey
ID: 22728755
Solution,
Remove tick from 'Join NAT ip pool' solves it!
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Accepted Solution

by:
HKFuey earned 0 total points
ID: 22728758
See router settings
NAT.bmp
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Assisted Solution

by:olivierbreuer
olivierbreuer earned 150 total points
ID: 22728768
Great ! Glad you have found the solution !
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