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DisgruntledGoat
Asked: 2009-09-15 07:23:23 +0800 CST

How do I save iptables config?

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I have just installed Webmin on a Ubuntu server. According to the docs you need to open up port 10000 (which is what Webmin runs on), with this:

iptables -A INPUT -p tcp -m tcp --dport 10000 -j ACCEPT

It then says you need to apply the firewall configuration with:

/etc/init.d/iptables restart

However, this command doesn't work for me. Is there a different command that saves the changes on Ubuntu?

linux

4 Answers

  1. there is a package that contains a system service to restore 

    sudo apt-get install iptables-persistent

    put rules in /etc/iptables/rules.

    one way to do this is:

    sudo bash -c "iptables-save > /etc/iptables/rules"
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  2. Best Answer

    Your iptables rule is active once you execute it. Issuing a restart merely restores your iptables config to however it was last saved. There is no need to do the restart.

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  3. On many Linux distributions, you can save changes made to iptables config by:

    service iptables save

    or alternately

    /etc/init.d/iptables save

    But this doesn't activate changes, it merely makes them permanent. The moment you executed the iptables command, the change was active. This command makes changes in real time.

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  4. iptables-save
iptables-restore

    will save rules in a plain text file, and usually restored on system sturup by the init.d script. see iptables.conf e iptables man for details

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