Troubleshooting FTP Connections¶
In pfSense® software versions 2.0.x and 2.1.x, the FTP proxy is in -kernel. The only options to control its behavior are an on/off switch and a list of ports to be used by the proxy.
In pfSense software version 2.2.x and newer, there is no built-in FTP proxy. See Using NAT and FTP without a Proxy.
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 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.
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 recommended option)