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Re: [cobalt-security] Should I worry
- Subject: Re: [cobalt-security] Should I worry
- From: "Gerald Waugh" <gerald@xxxxxxxxx>
- Date: Wed, 12 Dec 2001 15:03:11 -0500
- List-id: Mailing list for users to address network security on Cobalt products. <cobalt-security.list.cobalt.com>
During the last few days I got hundreds of these:
Dec 12 09:04:08 qube3 sendmail[20950]: NOQUEUE: mrh.rcmail.com [216.54.1.19]
did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
should I worry.
Meanwhile I changed the default rule of my firewall from accept to deny.
Most likely someone scanning you!
If it's an unknown IP, it's a good idea to DENY.
Gerald