From owner-freebsd-net  Mon Jul 24  8: 6:36 2000
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Date: Mon, 24 Jul 2000 09:05:39 -0600 (MDT)
From: Nick Rogness <nick@rapidnet.com>
To: "Roberto Nunnari, AGIE" <roberto.Nunnari@agie.ch>
Cc: net@freebsd.org
Subject: Re: gateway strange behaviour for telnet and ftp
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On Mon, 24 Jul 2000, Roberto Nunnari, AGIE wrote:

> 
> But why it behaves that way only for telnet/ftp/nfs?

	When you telnet to a host on your network, the telnetd daemon
	running on that machine, issues a (PTR) request to your name
	server asking for name of the host connecting.

	A good test would be using nslookup:

	# nslookup
	Default Server:  ns1.domain.com
	Address: 192.168.1.1

	> 192.168.1.2
	Server:  ns1.domain.com
	Address:  192.168.1.1

	*** ns1.domain.com can't find 192.168.1.2: Non-existent host/domain

	If that request makes your nameserver dial, you know you have
	found your problem.

	Solution:  Either add entries in all of your /etc/hosts (or
	equivilent hosts file) or add a in-addr-arpa zone in your
	nameserver:

	zone "1.168.192.IN-ADDR.ARPA" {

		blah blah
		allow-query { 192.168.1/24; };
	};

Nick Rogness
- Drive defensively.  Buy a tank.





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