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6.8

Brute Force Attack

Asked by briancassin in Windows Network Security

Tags: brute, force, attack

Hello everyone,

I have an IIS server that is behind a firewall but in the DMZ, this server we recently enabled FTP on to be able to have other satellite offices so they can upload their own files for the websites they create to our server. Access to the different websites is defined upon username.

We had a long brute force attack run against us with them using admin, administrator, and administratuer for the accounts they were trying to log into.. 1,000's of system event log entries

Needless to say they were not successful but now I am concerned they are going to keep trying until they get in the event log entry is shown below

How can I harden the server to prevent FTP attacks and or the firewall ?

Event Type:      Warning
Event Source:      MSFTPSVC
Event Category:      None
Event ID:      100
Date:            12/21/2005
Time:            12:29:07 PM
User:            N/A
Computer:      XXXX
Description:
The server was unable to logon the Windows NT account 'Administrateur' due to the following error: Logon failure: unknown user name or bad password. The data is the error code.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Get your answer NOW

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Brute Force Attack

Asked by briancassin in Windows Network Security

Tags: brute, force, attack

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