Re: Telnet port 25

From: Bob Booth - UIUC (booth@UIUC.EDU)
Date: Wed Dec 10 2003 - 13:49:56 EST


You took the words right out of my email... ;-) I think this is very
possible, however, depending on the number of people you want to 'talk' to
you, it could be a very long hosts.allow list... But quite do-able.

bob

On Wed, Dec 10, 2003 at 10:47:21AM -0800, Robert Miller wrote:
> Not sure if it's possible with vanilla sendmail, it may be... but I
> wonder if you could do such a thing with TCPWrappers? If you could
> start sendmail using TCPWrappers, that would allow you to use the
> hosts.allow and hosts.deny files to say which boxes could talk to your
> smtp port...
>
> Not sure if it's possible... anyone know if this even sounds feasible?
>
> --rm
>
> -----Original Message-----
> From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
> Miller, Dave (I.S.)
> Sent: Wednesday, December 10, 2003 10:31 AM
> To: aix-l@Princeton.EDU
> Subject: Re: Telnet port 25
>
>
> Thanks for the replies.
> Maybe I should ask/approach this way...can I limit telnet to respond
> only to certain IP addresses, or sendmail relays for that matter?
> thanks
>
> -----Original Message-----
> From: Bill Verzal [mailto:BVerzal@KOMATSUNA.COM]
> Sent: Wednesday, December 10, 2003 12:22 PM
> To: aix-l@Princeton.EDU
> Subject: Re: Telnet port 25
>
>
> smtp runs on port 25. You do not need sendmail running to send mail out
> of
> a box. Once you stop sendmail, telnet to port 25 will be closed.
>
> BV
> --------------------------------------------------------
>
> "If everything is coming your way, then you are in the wrong lane"
>
> Bill Verzal
> AIX Administrator, Komatsu America
> (847) 970-3726 - direct
> (847) 970-4184 - fax
>
>
>
> "Miller, Dave
> (I.S.)"
> <Dave.Miller@BHS.
> To
> ORG> aix-l@Princeton.EDU
> Sent by: IBM AIX
> cc
> Discussion List
> <aix-l@Princeton.
> Subject
> EDU> Telnet port 25
>
>
> 12/10/2003 11:10
> AM
>
>
> Please respond to
> IBM AIX
> Discussion List
> <aix-l@Princeton.
> EDU>
>
>
>
>
>
>
> Can someone point me in the write direction as to how I would easily
> disallow telnet to port 25, but still allow telnet to port 23?
>
>
> I.e. I don't want to be able to telnet to port 25 and send mail, but I
> still want to run sendmail, and allow telnet... or am I looking at this
> wrong? Thanks.
>
>
>
>
>
>
>
>
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