I have an FTP server in my DMZ that can be access from the WAN interface but the same FTP server can't be access by the LAN clients. I already have a firewall rule -> Allow TCP 21 (FTP) from LAN subnet to anywhere but it doesn't seem to work according to one of my officemate. BTW, I am administering the pfSense WebGUI remotely and the DMZ servers are using 1:1 NAT. I also configured a firewall rule to allow FTP connections to the FTP server and I know that it's working because I myself connected to the server using filezilla. Is there a workaround for this issue? If there is, will it work if my pfSense will use a multi WAN setup?

TIA

Jan