dictionary attack

[Alex Neuman van der Hans]

Try fail2ban or vispan.

On 2/18/2011 3:08 PM, Mikael Syska wrote:
> Hi,
>
> <joke>
> Go offline ... then they can't attack your domain.
> </joke>
>
> What seems to be the problem? Since you can't really make them stop
> ... there arent much you can do other than deny delivery for unknown
> users in your system ... and then scan the rest.
>
> Still ... I can't see the problem.
>
> mvh
> Mikael Syska
>
> On Fri, Feb 18, 2011 at 8:44 PM, Ejaz<mejaz at cyberia.net.sa>  wrote:
>> Hello,
>>
>>
>>
>> Now days there is lots of dictionary attacks towards my domain, find the
>> below one of the example, would any one please help me how can I prevent
>> such attacks,
>>
>>
>>
>> In my Linux machine, I have postfix, MailScanner, Spamassasin and clamav,
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>   xulmymyzfjkaf at boutiquesearchfirm.com
>>
>>                                           nkanta at cyberia.net.sa
>>
>>                                           nm2001 at cyberia.net.sa
>>
>>                                           nmj at cyberia.net.sa
>>
>>                                           nmj_textile at cyberia.net.sa
>>
>>                                           nmjnn at cyberia.net.sa
>>
>>                                           nnasmac at cyberia.net.sa
>>
>>                                           nnasmacb at cyberia.net.sa
>>
>>                                           nnasmacd at cyberia.net.sa
>>
>>                                           nnasmacdd at cyberia.net.sa
>>
>>                                           nnasr at cyberia.net.sa
>>
>>                                           nnsisco at cyberia.net.sa
>>
>>                                           noda at cyberia.net.sa
>>
>>                                           nomer1 at cyberia.net.sa
>>
>>                                           nospam at cyberia.net.sa
>>
>>                                           notify at cyberia.net.sa
>>
>>                                           nour at cyberia.net.sa
>>
>>                                           noura at cyberia.net.sa
>>
>>                                           nozhamed at cyberia.net.sa
>>
>>                                           nplumbly at cyberia.net.sa
>>
>>                                           ns at cyberia.net.sa
>>
>>                                           nsaf-riyadh at cyberia.net.sa
>>
>>                                           nsaurabia at cyberia.net.sa
>>
>>
>>
>>
>>
>>
>>
>> Regards,
>> __________________
>> Ejaz
>> Sr,Systems Administrator
>> Middle East Internet Company (CYBERIA)
>> Riyadh, Saudi Arabia
>> Phone: +966-1-4647114  Ext: 140
>> Mobile +966-562311787
>> Fax: +966-1-4654735
>> E-mail: mejaz at cyberia.net.sa
>>
>>
>>
>> --
>> This message has been scanned for viruses and
>> dangerous content by MailScanner, and is
>> believed to be clean.
>> --
>> MailScanner mailing list
>> mailscanner at lists.mailscanner.info
>> http://lists.mailscanner.info/mailman/listinfo/mailscanner
>>
>> Before posting, read http://wiki.mailscanner.info/posting
>>
>> Support MailScanner development - buy the book off the website!
>>
>>

-- 
--

Alex Neuman van der Hans
Reliant Technologies / Vida Digital
http://vidadigital.com.pa/

+507 6781-9505
+507 832-6725

Follow @AlexNeuman on Twitter
http://facebook.com/vidadigital