I create the rules to iptables. But, when I restart the computer, the rules don't work! How to save the rules on Ubuntu ?
The problem was solved
After of the write the commands iptables, do.
1. sudo su 2. iptables-save > /etc/iptables.rules 3. In /etc/network/if-pre-up.d/iptables,put: #!/bin/sh iptables-restore < /etc/iptables.rules exit 0 4. After, in /etc/network/if-post-down.d/iptables,put: #!/bin/sh iptables-save -c > /etc/iptables.rules if [ -f /etc/iptables.rules ]; then iptables-restore < /etc/iptables.rules fi exit 0 5. After, give permission to the scripts: sudo chmod +x /etc/network/if-post-down.d/iptables sudo chmod +x /etc/network/if-pre-up.d/iptables
More information: https://help.ubuntu.com/community/IptablesHowTo#Saving_iptables Good luck!
The easy way is to use
sudo apt-get install iptables-persistent
After it's installed, you can save/reload iptables rules anytime.
sudo /etc/init.d/iptables-persistent save sudo /etc/init.d/iptables-persistent reload
Ubuntu 16.04 Server
The installation as described above works without a problem, but the two commands for saving and reloading above do not seem to work with a 16.04 server. The following commands work with that version.
sudo netfilter-persistent save sudo netfilter-persistent reload