Re: [exim] Block access to certain IPs

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Lähettäjä: Fabien LUCE
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Vastaanottaja: exim-users
Aihe: Re: [exim] Block access to certain IPs


And how can you forecast the IP's that you want to prevent from
connecting?

Le 23.11.2012 08:48, Bernard Hurley a écrit :

> On Thu,

Nov 22, 2012 at 08:07:12AM -0300, Jorge wrote:
>
>> Hi, Daily I found

in rejectlog file hundreds of lines like: 2012-mm-dd hh: mm: ss
fixed_login authenticator failed for ([www.xxx.yyy.zzz [1]])
[ww.xx.yyy.zz]: 535 Incorrect authentication data (set_id = xyz) And in
most of them the IP is the same. How I can prevents access to EXIM of
those IPs?
>
> On my Debian system I block IP's using iptables like

this:
>
> iptables -A INPUT -s XX.XX.XX.XX -p tcp --dport 25 -j

REJECT
>
> where you obviously have to fill in the correct address for

the X's.
>
> You can also block a range of IP's with code like:
>
>

iptables -A INPUT -s XX.XX.XX.0/16 -p tcp --dport 25 -j REJECT
>
> If

you do this the connections are blocked at the firewall and exim
> never

sees them. I hope this helps.
>
> Bernard
>
>> Thanks in advance.

Jorge Colaccini -- ## List details at
https://lists.exim.org/mailman/listinfo/exim-users [2] ## Exim details
at http://www.exim.org/ [3] ## Please use the Wiki with this list -
http://wiki.exim.org/ [4]



Links:
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[1]
http://www.xxx.yyy.zzz
[2]
https://lists.exim.org/mailman/listinfo/exim-users
[3]
http://www.exim.org/
[4] http://wiki.exim.org/