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From: keijo@vttux1.vtt.fi (keijo tuominen)
Newsgroups: comp.sources.wanted
Subject: Attachport ??
Message-ID: <5130@hemuli.tik.vtt.fi>
Date: 24 Sep 90 09:25:47 GMT
Sender: news@hemuli.tik.vtt.fi
Organization: Technical Research Centre of Finland
Lines: 31

> Does anyone know if somewhere is available a program that checks
> where from telnet/ftp/smtp connections are made and checks if 
> machine requesting connection is allowed to enter to that
> particular host. So if it is not allowed to do connection 
> the target machine should close connection and also make a log
> for that connection attempt.

If your servers are running under attachport rather than inetd, this is
easy. Just wrap telnetd inside a script like this:

  #!/bin/sh
  if printenv REMOTE | sed 's/.*@//' | fgrep -s -f -x /etc/telnetd.allowed
  then
    exec telnetd
  else
    # make some appropriate log entry
  fi

You put a list of allowed Internet numbers into /etc/telnetd.allowed,
one per line. For more flexibility, use grep instead of fgrep, and use
(anchored) regexps. attachport is available in the auth package, which
appeared a few months ago in comp.sources.unix.

I got this kind of reply to my question about whatch dog but
what is that attachport and where can I find it ?
If anyone have that auth  package I would like to have it 
--
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