The Berkeley Software Distribution (BSD) FTP-Proxy is a program that can be used to allow or block FTP connections through a firewall using the PF (Packet Filter) firewall. The PF firewall is a powerful and flexible firewall system that is included in the BSD operating system, such as FreeBSD and OpenBSD.
To allow outgoing active or passive FTP connections through the PF firewall, you can use the following rules:
# Allow outgoing active FTP connections pass out proto tcp from any to any port 21 # Allow outgoing passive FTP connections pass out proto tcp from any to any port > 1023Sourceww:w.lautturi.com
These rules will allow outgoing FTP connections through the PF firewall, regardless of whether they are active or passive.
It's important to note that these rules will allow all outgoing FTP connections, including both control and data connections. If you want to be more selective and only allow certain FTP connections, you can use more specific rules or use other features of the PF firewall, such as filtering based on IP address or port number.
It's also a good idea to carefully consider the security implications of allowing FTP connections through your firewall. FTP is an unencrypted protocol and can be vulnerable to attacks, so you should consider using a secure FTP protocol such as SFTP or FTPS instead.