2001601 : FTP error indicating a failed login

Medium RiskMedium Risk

Quick Links

Event description Jump to the top of this document

This signature detects failed attempts to log in to an FTP server, such as with an invalid username or password. Large numbers of events of this type can indicate attempts to brute force account names on the FTP server and the underlying operating system.

This represents a possible failed attempt by an intruder to gain unauthorized access to an FTP server. Take note of the destination address of the event (which is the attacking system), and any associated FTP username or password events that might give clues as to the identity of the attacker.

Products that have this security check Jump to the top of this document

FTP_Auth_Failed

This signature detects an excessive number of failures to authenticate to an FTP server. This may indicate a username/password guessing attack.


Affected platforms Jump to the top of this document

How to remove this vulnerability Jump to the top of this document

Monitor the source addresses for other suspicious activity.

References Jump to the top of this document

Information about this document Jump to the top of this document

The information contained in this document may change without notice, and may have been altered or changed if you have received it from a source other than Internet Security Systems. Use of this information constitutes acceptance for use in an "AS IS" condition, without warranties of any kind, and any use of this information is at the user's own risk. Internet Security Systems disclaims all warranties, either expressed or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Internet Security Systems be liable for any damages whatsoever, including direct, indirect, incidental, consequential or special damages, arising from the use or dissemination hereof, even if Internet Security Systems has been advised of the possibility of such damages.

Copyright © 1997 – 2009 IBM Internet Security Systems. All rights reserved.

This page was created on Thu Jun 11 09:06:15 2009