I have one client who uses a Windows 2003 member server,Titan ftp server is installed on port 521 which is configured to allow passive mode.
Firewall is Symantec security gateway 360. I have created inbound security rules to allow ftp traffic on port 521
When i try to ftp from outside with filezilla as client i end up only with error "Transfer channel cant be opend" and in dos mode i am given error 425.
I tried to ftp on the memberserver itself - it works and i am able to see directory listing
I tried from an internal machine - it works and i am able to see directory listing
tried from internal machine with public ip adress and port - this works too. this means that sgs 360 allows the traffic.
Only when i try from external computer with public ip adress on port 521 it give this error. Do i have to open some other ports on my sgs ? or where is it going wrong.
Thanks for you replies in anticipation