[Dovecot] How to limit max number of connections for ip address

[Charles Marcus]

On 2012-02-24 10:07 AM, Wilberth Perez <wilberth.perez at uady.mx> wrote:
> My question was because constantly we received brute force attack from
> some of ip address which uses pop3 service to affect dovecot's login
> proccess.

This is quickly becoming an FAQ...

If this is linux, and these attacks are from the *same* IP address(es) 
(sounds like that is the case), then your best option is something like 
fail2ban. If, however, they are from bots that change IP address each 
time, fail2ban won't be effective...

-- 

Best regards,

Charles