IPTables Lost After Reboot of Head Node
The iptables were lost every time the machine was rebooted so I found I needed to save the iptabels to a file /etc/iptables.rules.
Use the following command to use NAT for the compute nodes sudo iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
Then in Ubuntu become su by using sudo su then use the command iptables-save > /etc/iptables.rules
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