Re: [Exim] Blocking incessant relay testers with Exim 4

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Autor: Dave C.
Fecha:  
A: Juha Saarinen
Cc: exim-users
Asunto: Re: [Exim] Blocking incessant relay testers with Exim 4
On Wed, 12 Jun 2002, Juha Saarinen wrote:

> Dave C. wrote:
> > On Wed, 12 Jun 2002, Juha Saarinen wrote:
> > 1. Contact the idiots' ISP and tell them they have spammers on their
> > networks. Worse yet, they have DUMB spammers who are too stupid to
> > realize their relays are failing.
>
> BTDT, no response. And, I'm not the only one to complain.
> http://makeashorterlink.com/?P32A21A01
>
> > 2. If it continues, get your router admin to put an IP level block in
> > to prevent all traffic from the relevant IP's..
>
> Router admin? Hey... that's me! ;-)
>
> > You can reference such a file from within an ACL.
>
> Yes, unless I misunderstand it, there's no way to refuse SMTP connections to
> specific host IP addresses and/or IP address ranges with ACLs.


I'm not sure if there is a way to completely refuse connections from
within exim at all. host_reject_connections does the following:

# telnet 127.0.0.2 25
Trying 127.0.0.2...
Connected to 127.0.0.2 (127.0.0.2).
Escape character is '^]'.
554 SMTP service not available


>
> > Some hosts are braindead and will keep trying over and over. Of
> > course, some will keep trying regardless of where you reject.
>
> Looks like another router block then.
>
> Cheers,
>
> --
> Juha
>
>



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