Troubleshooting FTP Connections

Configuration guides, troubleshooting and practical advice for AZTCOFW.

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Disabling the FTP Proxy

If the FTP proxy must be disabled, this may be done by visiting System > Advanced , on the System Tunables tab, then set debug.pfftpproxy=1 . Set it to 0 again to enable the proxy.

FTP Ports

FTP traffic is identified by the use of port 21. Other ports can be used if they added to a comma-separated list in the system tunable debug.pfftpports (e.g. 21,2121,4559 )

Rules to allow FTP

If problems are encountered with FTP, check the rules to/from FTP devices, ensure that both the control port and PASV range are allowed.

Troubleshooting/Alternatives

Disable the FTP Proxy and attempt the connection again Use SCP/SFTP which only needs 1 port to traverse the firewall since it is wrapped in SSH (yes a safe AND simple way of traversing a firewall!) Don’t use FTP (highly