I understand. Actually, could an open relay also be used by a malicious
hacker to relay a DOS attack?
Smitty
On Friday 28 June 2002 15:10, you wrote:
> On Fri, 28 Jun 2002, Smitty wrote:
> > Russ, I attempted to send this directly to you and it was returned. Do
> > you have something configured on your servers to reject the verizon.net
> > domain?
>
> no, not at all -- when I killfile someone or a domain, a
> different message is returned -- only proven open relays.
>
> As to IP 206.46.170.103, see:
> http://www.dsbl.org/message.php?id=912726
>
> You may wish to ask your ISP why they add to the spam flood,
> by NOT running SMTP-AUTH and closing their open relays. See:
> http://www.owlriver.com/tips/smtp-auth.html if you use a
> modern Free operating system for setup and debugging
> instructions.
>
> > Recipient: <herrold@owlriver.com>
> > Reason: 5.3.0 <herrold@owlriver.com>... Rejected - see
> > http://www.dsbl.org/ 206.46.170.103
>
> ------------
>
> Smitty said:
> > Thanks, Russ. I tried out your syntax - never knew that. Is
> > that some sort of bash scripting?
>
> On Thursday 27 June 2002 21:22, R P Herrold wrote:
> > [root@couch mirror]# \ls -al `which cc `
> > lrwxrwxrwx 1 root root 3 May 10 19:51 \
> > /usr/bin/cc -> gcc
> > [root@couch mirror]#
>
> not 'scripting per se -- it is a backtick sub shell which runs
> the 'which' command, returning in our example an argument with
> the fully qualified path of the first found 'cc' binary in
> the executable PATH.
>
> I believe it generally available in POSIX compliant /bin/sh
> implementations. I use that form of expression, so I don't
> need to remember when a given *nix or Unix keeps its binaries.
> I let the host do it.
>
> -- Russ Herrold
Thanks, very interesting.
Smitty
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