Is it true that FTP do not works well with NAT?

[lyesinn.ang]

How true is this statment ?

" The file transfer protocol (FTP) is another example of a protocol/application with which NAT has trouble correctly supporting . The FTP layer 3 connection addressing is also embedded (hidden) within the payload of an outgoing data packet. Some NAT application processes do not decode this FTP packet properly which leads to a failure in the FTP host connection."

Does Cisco 3620 have trouble with FTP with NAT? Thank for advise.

[thisisshanky]

Cisco IOS does the necessary translation on the payload of the packet while doing NAT. But if the ftp is working on a non standard port, then it will ignore the payload and FTP wont work. For this to work, you need to do the following,

http://www.cisco.com/warp/public/556/6.html

check this link out!