From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Vernon A. Fort" <vfort@provident-solutions.com>
Subject: Access to Internal server via public address
Date: 10 Dec 2003 13:33:17 -0600
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Anyone,

  The Problem:  I have an alias public address DNAT'ed to and internal
address - normal and working

  What i need is to access this server using the PUBLIC address from an
internal workstation.  What I have:

	INTNIC = eth1
	EXTNIC = eth0

	INTERNALNET = 192.168.20.0/24

	FIREALLIP = 1.2.3.4
	DNATADDR = 1.2.3.5

  /sbin/iptables -I FORWARD -p tcp -i eth0 -o eth1 -d 192.168.20.0/24
--dport 22 -j ACCEPT
  /sbin/iptables -t nat -A PREROUTING -p tcp -d 1.2.3.5 -s !
192.168.20.0/24 --dport 22 -j DNAT 192.168.20.22:22

  I also have a SNAT for masquerading everyting going out

	/sbin/iptables -t nat -A POSTROUTING -s 192.168.20.0/24 -o eth0 -j SNAT
--to-source 1.2.3.4

  I have searched for a solutions longer than I care to admit.  Can
anyone give me an example on how to allow an internal ip address access
to another internal address via the DNAT'ed public address.

Vernon Fort