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There is a quote in the masq-HOWTO about using redirect before masquerade to
enable hosts on the localnet to access masqueraded machines on the same
localnetwork but it was not very detailed or well worded. I am having
problems trying to emulate the described configuration.

Here is the setup:

(MASQing, portfowarding linux box)
localnet 192.168.1.0/24
externalip 1.2.3.4
internalip 192.168.1.1

(internal MS SMTP connector)
 ip: 192.168.1.100
port fowarded from 1.2.3.4 (fw) as port 25

nameserver  on dmz 1.2.3.5 with registered mail exchanger as 1.2.3.4:25 (fw)

Here's the problem:

internal machine 192.168.1.7 wants to send mail using a local MTA.
MTA looks up mail exchanger for our domain
MTA attempts to connect to 1.2.3.4 port 25
Connection masq'd and SYN sent to 192.168.1.100:25 from 192.168.1.7:1056 on
internal interface of firewall

192.168.1.100 sends SYN, ACK to 192.168.1.7:1056 

192.168.1.7 sends RST back to 192.168.1.100...OOPS

What is the order and configuration of REDIRECT and ipmasqadm portfw that I
need to configure in order for these connections to be correctly
redirected/masq'd on the firewall machine given the sample setup?

Thanks in advance for any help,
Jake Repp

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