Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Does NBAR really recognize FTP data transfers over random ports ?

We have an application which generate quite some passive mode FTP transfers. Typically, the data transfer channel is between two random TCP ports negotiated in the FTP control channel. (confirmed by traces we took)

But NBAR doesn't seem to count these data channel transfers because Unknow increases and FTP stays low.

Is this dependent on IOS release ?

1 REPLY
Silver

Re: Does NBAR really recognize FTP data transfers over random po

The following links have informationon Passive mode FTP transfers.

Determining the Traffic Not Recognized by NBAR

http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a0080094ac5.shtml

Troubleshooting TCP-IP

http://www.cisco.com/en/US/tech/tk648/tk364/technologies_white_paper09186a0080093fb9

237
Views
0
Helpful
1
Replies