Permanently saving iptables options on the Digi CM

  • Add the following command in the "/usr2/rc.user" script file just above "exit 0". Disabling telnet is just shown as one example.

    # Disable the telnet service from all hosts
    iptables -A INPUT -p tcp --dport 23 -j DROP


  • reboot

If you factory default the unit, the "/usr2/rc.user" script file is moved to "/usr2/rc.user.old#" and the default rc.user file will be restored.

Last updated: May 09, 2019

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