Chris F schrieb:
> --- Rajesh Bandar <[EMAIL PROTECTED]> wrote:
> > I blocked the port no 25 for one of the Windows NT
> > machines on our network. But
> > still someone is using our server to send spam mails
> > accross the internet. On
> > the Firewall do I need to do anything else to stop
> > spamming.
One solution is to configure the mailserver to disallow nonlocal mail relaying. If
that is not possible or too complicated, you may do that on the firewall following
this receipt. Create a few rules and services.
service SMTP.ANY: just keep the defaults
service SMTP.INCOMING: defaults, plus to: *@your.company.adr
if you have a SMTP relay in a DMZ create (from/to/service):
Any dmz.mailserver smtp-->SMTP.INCOMING
dmz.mailserver Any smtp-->SMTP.ANY
internal.mailserver dmz.mailserver smtp-->SMTP.ANY
If you do not have a DMZ (or mailserver in DMZ), use this instead:
Any mailserver smtp-->SMTP.INCOMING
mailserver Any smtp-->SMTP.ANY
HTH
Volker
--
Volker Tanger <[EMAIL PROTECTED]>
Wrangelstr. 100, 10997 Berlin, Germany
DiSCON GmbH - Internet Solutions
http://www.discon.de/
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