Fail2ban
2011/10/25, Rafael Pereira de Abreu <[email protected]>:
> EHLO
>
> Our host was recently added to a blacklist. I watched the logs below:
>
> 10-24 12:05:15 CHKUSER relaying rcpt: from
> <[email protected]:[email protected]:>
> remote <User:unknown:216.24.194.84> rcpt <[email protected]> : client allowed
> to
> relay
> 10-24 12:05:15 policy_check: local [email protected] -> remote
> [email protected]
> (AUTHENTICATED SENDER)
>
> I understand that someone logged into the host and used as a relay. I'm
> searching
> the internet the following questions:
>
> 1) How to force users to utilize strong passwords?
>
> 2) Is there a way to avoid this kind of attack?
>
> 3) Are there any warning for increasing message queue or simultaneous
> connections?
>
> 4) You can block attempts to break password brute force?
>
> I thank first of all and I go searching.
>
> --
> Rafael Pereira de Abreu Rosa
> Técnico de Suporte a Sistemas <http://suporte.ic.uff.br>
> Instituto de Computação - UFF (Fluminense Federal University - Brazil)
> Tel: (21) 2629-5664
> Cel. (21) 8798-9057
>
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--
Enviado desde mi dispositivo móvil
---------------------------------------------------------------------------------
Qmailtoaster is sponsored by Vickers Consulting Group
(www.vickersconsulting.com)
Vickers Consulting Group offers Qmailtoaster support and installations.
If you need professional help with your setup, contact them today!
---------------------------------------------------------------------------------
Please visit qmailtoaster.com for the latest news, updates, and packages.
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
