I had the problem, that i had to run an active FTP server behind my pfsense box. Who ever dealed with FTP and firewall knows, that it is very painfull.
So first, i configured a vitrtual IP:
After that the NAT Rule:
Then a 1:1 NAT Rule for the outgoing traffic:
Till now, it was easy. But for the next option i searched hours and hours. First thanks to Commander for the hint. I don’t know why i had to deactivate “debug.pfftpproxy”, but after disabling this, it worked.