Can NBAR realize passive FTP traffic ?

[HDBank Network]

Hi

Can anybody tell me ?

And how can I config router to realize passive FTP traffic?

[cadet alain]

NBAR will do the trick without any problem as it can inspect traffic up to layer 7.

[HDBank Network]

I tested 2 PCs (1 server, 1 client with a file 200M) but FTP packets increased a few while unknown packets were counted up fast when I show ip nbar protocol-discovery, I used wireshark and it show a few FTP packets on port 21.