[ale] sendmail question

[Jim Kinney]

Put an record for the mail server in /etc/hosts. Set the network to look
at hosts then dns. Now the lookup doesn't even pass through an outside
machine. 

Ipchains can also be set to block port 25 that doesn't originate on the
mail server. It can also be configured to block port 25 traffic not
destined for the outside world. Don't ask me how, though. I'm muddeling
through another sendmail config problem and have no clue.

JimK

On Mon, 21 Aug 2000, Carl Forsell wrote:

> but.. their concern is that since they look to us for DNS, is it possible
> that their e-mail "loops through" our system, and thus a sniffer here could
> intercept it.   I can't see any reason that it would, or that it should be a
> concern,  but they want to document that the material has never left their
> internal network.  (IPO type stuff)
> 
> 
> -----Original Message-----
> From: Robert L. Harris <Robert.L.Harris at rnd-consulting.com>
> To: Carl Forsell <cforsell at roman.net>
> Date: Monday, August 21, 2000 11:59 AM
> Subject: Re: [ale] sendmail question
> 
> 
> >
> >
> >Anyone with a sniffer sitting bewteen their email server and the recepiant
> >could read the email.  Look into using PGP to encrypt email as it is sent.
> >I do this and it works very well.
> >
> >Robert
> >
> >Thus spake Carl Forsell (cforsell at roman.net):
> >
> >> I have a customer who has has a Linux e-mail server (sendmail) inside
> their
> >> firewall and  connects through ISDN to us for internet access.  They have
> a
> >> concern about confidential documents that they e-mail within the office.
> >>
> >> In the system described above, I can't see how the e-mail could loop
> through
> >> us during it's travel - or be intercepted by "outsiders".  Am I wrong?
> Is
> >> there any way of documenting that a piece of internal e-mail has never
> >> passed out side of their firewall?
> >>
> >> --
> >> To unsubscribe: mail majordomo at ale.org with "unsubscribe ale" in message
> body.
> >
> >
> >
> >:wq!
> >---------------------------------------------------------------------------
> >Robert L. Harris                |  Micros~1 :
> >Senior System Engineer          |    For when quality, reliability
> >  at RnD Consulting             |      and security just aren't
> >                                \_       that important!
> >DISCLAIMER:
> >      These are MY OPINIONS ALONE.  I speak for no-one else.
> >FYI:
> > perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
> >
> 
> --
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> 

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