Re: Open Proxy - how do I prevent it? (long mail)
From: Colonel Flagg (colonel_flagg@NOSOUPFORJ00internetwarzone.org)
From: colonel_flagg@NOSOUPFORJ00internetwarzone.org (Colonel Flagg) Date: Fri, 4 Apr 2003 16:30:08 -0500
In article <email@example.com>, firstname.lastname@example.org
> > At a guess, your smtp server is probably accepting mail from and to any
> >address on the net - i.e. it's probably acting as a relay usable by
> >spammers. Unless you have a good reason to be offering an SMTP service to
> >the world at large, you should probably block port 25; if OTOH you're
> >running your own MX there should be some way to configure qmail to only
> >accept mail destined for your domain.
> I am running my own MX, so blocking the port wouldn't help me much.
> I have tried setting up Qmail to only accept mail from local hosts,
> but I might have misconfigured something.
> Do you know any program or web page, that offers to test whether or
> not a site "offers" an open STMP relay?
> Thomas Rokamp
telnet to relay-test.mail-abuse.org on port 25 from the IP address
associated with your mail server.
-- Colonel Flagg http://www.internetwarzone.org/ Privacy at a click: http://www.cotse.net Wanna ask a question in Usenet? http://www.tuxedo.org/~esr/faqs/smart-questions.html Everything about Usenet answered: http://www.internetwarzone.org/answers.html America WILL NOT forget 9-11-01