Hi Frank, As said before, please confirm if there is appropriate NAT rule configured for FTP. Similar to the following should be the security rule:- Security Rule :-FTP-rule-Inbound Source Zone:- untrust (Outside zone) Destination Zone:- trust (inside zone) Source Address:- any Destination Address:-64,123,23,20 (Public Ip of FTP Sever) Application: FTP Action:- Allow ATTACHMENT:- FTP-rule.PNG For incoming connection, what we call Destination NAT should be applied:- It should look something like the following:- NAT Rule:- FTP-inbound Source Zone : Untrust (Outside zone) Desination Zone:- Untrust (Outside zone) Source Address: Any Destination Address:64,123,23,20 (Public Ip of FTP Sever) Source Translation: None Destination Translation:- 192.168.10.10 (Internal Ip of FTP Server) ATTACHMENT:- NAT-inbound.PNG Regards, Parth
... View more