Hi,
Jerry Stuckle <jerry@???> (Di 11 Feb 2014 19:43:20 CET):
> Hi, all,
>
> I'm having a problem with hackers trying to break into my email
> server with various userid's and passwords, I suspect on port 25
> (but haven't proven it). I do eventually block the IP, but not
> until after several unsuccessful attempts.
>
> What I would like to do is prevent logging in via Port 25 (I use a
> different port for signing into the server), hopefully stopping
> these antics in their track.
>
> Can someone suggest how I can do this?
You may enhance your autenticator sections:
begin auth
…
server_advertise_condition = ${if !eq{25}{$received_port}}
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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