A Dissabte 16 Juny 2007 16:10, Jon Slater va escriure:

Hi,

I’ve posted this before but no one was able to help. I can’t figure out what they are trying to do, and if I should be concerned.

I am running dovecot version 0.99.14 on Fedora Core 4. It appears that my dovecot server is under attack. This morning in my system e-mail I saw this:

Hi Jon,

just my 5 cents,

eventually you can figure out if they are trying to login directly to you imap/pop3 ports or maybe through a webmail?

In every case why don't you give a try to a fail2ban program to block automatically login failures through iptables and of course upgrade your dovecot's installation?

http://drees76.blogspot.com/2006/08/fail2ban-dovecot-and-brute-force.html

greetings,

dani