How to use iptables-set-ports-transfer.sh

The iptables-set-ports-transfer.sh script is used to setup the iptables rules for our group's server node0, which gives the node1 ~ node10 the ability to access Internet by NAT and map the their vnc ports to node0.

• If the server node0 has rebooted and the iptables are empty, you can just run the script iptables-set-ports-transfer.sh.

/bin/bash iptables-set-ports-transfer.sh

• If the iptables is not empty, you need to firstly clear the existing rules by running iptables -F, then run the script iptables-set-ports-transfer.sh.

iptables -F
/bin/bash iptables-set-ports-transfer.sh

More about iptables

1. save the current rules of iptables to a sepcified files

iptables-save >> path-to-file/filename

2. if the rules of iptables are cleared after reboot, you can run this to restore the rules from a specified file

iptables-restore < path-to-file/filename

3. if you run iptables-save it just print the current iptables rules. Otherwise, you can run service iptables save to save the rules to /etc/sysconfig/iptables, form which it can reload the configuration after reboot