possible SMTP attack

• To: fedora-list@xxxxxxxxxx
• Subject: possible SMTP attack
• From: "Olga" <olga@xxxxxxxxxxxxxx>
• Date: Sat, 31 Jul 2004 13:26:08 -0500 (CDT)
• Importance: Normal
• Reply-to: For users of Fedora Core releases <fedora-list@xxxxxxxxxx>
• User-agent: SquirrelMail/1.4.2-3

Hi,

I got this message in the logwatch sent to root:


Client quit before communicating:
    222.183.141.253 : 1 Time(s)

**Unmatched Entries**
   [222.183.141.253]: possible SMTP attack: command=AUTH, count=6: 1 Time(s)


What does it mean? How can I protect my server against SMTP attacks?

Thank you.

Olga

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    • From: Pedro Fernandes Macedo
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