Re: Telnet port 25

From: Robert Miller (rmiller_at_SMUD.ORG)
Date: 12/10/03

  • Next message: Bob Booth - UIUC: "Re: Telnet port 25" 
    Date:         Wed, 10 Dec 2003 10:47:21 -0800
To: aix-l@Princeton.EDU

    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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  • Next message: Bob Booth - UIUC: "Re: Telnet port 25"

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