I've set up named to cache external addresses but be authoritative for
my local domain. This prevents dialouts on local connects.
I don't use sendmail so I can't guarantee what might happen there.
-- Michael
--Forwarded----------------------------------
Date [Fri, 09 Apr 1999 10:24:30 +0200]
To: Stefano Luporini <[EMAIL PROTECTED]>
>From: Marc-Oliver Kalis <[EMAIL PROTECTED]>
Cc: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Subject: Re: sendmail brings up line
Stefano Luporini wrote:
>
> Hi folks,
> I use diald with 2.0.34 kernel form slackware distribution, since a
> couple of years ;
> linux acts as a proxy server and mail server for a network of PC and
> Macs to link the LAN to an ISP;
> it works fine, but if some client of the network want to deliver mail to
> other client inside the network, sendmail brings up the line, even if
> the addresses of the sender and the receiver (i.e. MAIL FROM: and RCPT
> TO: are local)
> .
> I've tried to setup a "cache only" dns , but the only advantage i got is
> that clients does'nt have to wait for the link (sendmail says OK to the
> client, then brings up the link)
>
> the questions are:
> i) does exists some filter rule to block in such a smart way SMTP
> packets that only really outside SMTP traffic goes out ?
> ii) (I believe that ...) it's a sendmail configuration problem. which
> kind of feature or hack or rule should I use ?
> (my sendmail is 8.9.3 , I use m4 to configure it)
>
> excuse me if those questions are just "around" diald and for my
> macaroni-english
>
> Stefano Luporini
> [EMAIL PROTECTED]
>
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what you could try to do is configure your hosts file, that you have
your local domain in there configured with the private IP address and,
then stup your system, that it firste checks up on the hosts file before
it goes to the DNS.
since sendmail tries to locate the domain via , if it can't find it in
the hosts file.
it worked fine with my system.
rgds
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