From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tobias Andresen <tobiasarp@gmx.de>
Subject: NTP forwarding
Date: Sat, 5 Mar 2016 15:15:49 +0100
Message-ID: <56DAEA15.409@gmx.de>
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Hi,

i have following network structure:


     NTP-Server (62.214.6.29)
               |
               |
               |
      (eth0: 10.0.0.95)
        Embedded board
    (eth1: 192.168.31.95)
               |
               |
               |
        Ethernet-Switch
         |        |    |
         |        |    |
        PC1       |   PC3 (192.168.31.98)
(192.168.31.96)  |
                  |
                 PC2
(192.168.31.97)


The 3 PCs shall be able to connect to the NTP server (62.214.6.29)
to update their time but i cannot figure out how to configure the 
iptables rules
on the embedded board to achieve this.

I have tried to forward port 123 but it does not work.

Regards
Tobias