Re: [exim] ACL block incorrect authentication data

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Autor: Emanuel Gonzalez
Data:  
A: exim-users@exim.org, Olaf.Hopp@kit.edu
Assumpte: Re: [exim] ACL block incorrect authentication data
IP addresses change constantly so adding them to a file is not useful.


Regards,

________________________________
De: Olaf Hopp <Olaf.Hopp@???>
Enviado: miércoles, 29 de noviembre de 2017 12:39:06
Para: exim-users@???
Cc: emanuel_gonzalez@???
Asunto: Re: [exim] ACL block incorrect authentication data

On 11/29/2017 02:43 PM, Emanuel Gonzalez wrote:
> Hello.!!
>
>
> my idea is to block the IP that makes the unsuccessful login attempts to the smtp service.
>
>
> On the web I found the following rule, but not if it is what I need.
>
>
> acl_smtp_auth:
>                  drop    message = authentication is allowed only once per message
>                          set acl_m_auth = ${eval10:0$acl_m_auth+1}
>                          condition = ${if >{$acl_m_auth}{2}}
>                          delay = 30s
>                  accept

>



I am using in my acl_smtp_connect

        defer    hosts  = /opt/exim/blackips


The file "blackips" is dynamically build up by a cron-Job grepping through the exim log.
The good magic is that exim is aware of modification on my blacklist file
without HUP / reload / restart.

Regards, Olaf


--
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Dipl.-Geophys. Olaf Hopp
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