iptables-restore – Restore configuration of iptables tables

The iptables-restore command is used to restore the configuration of iptables tables from a specified file. This command is useful when you need to reload the configuration of iptables tables after making changes to the configuration file.

Overview

The iptables-restore command reads the configuration of iptables tables from a specified file and applies the configuration to the current iptables tables. The file must be in the format generated by the iptables-save command.

To use the iptables-restore command, you must have root privileges. The basic syntax of the command is as follows:

iptables-restore [options] [file]

Where file is the name of the file containing the iptables configuration, and options are any command-line options you want to use.

Examples

To restore the configuration of iptables tables from a file called iptables-save-file, you can use the following command:

iptables-restore < iptables-save-file

This command reads the configuration from the file iptables-save-file and applies it to the current iptables tables.

Specific use cases

The iptables-restore command can be used in a variety of situations, such as:

• Restoring the configuration of iptables tables after making changes to the configuration file.
• Applying a pre-configured set of iptables rules to a new server.
• Recovering from a misconfiguration or error that has caused iptables to stop working.

Options

The following table lists the available options for the iptables-restore command:

Troubleshooting tips

If you encounter issues when using the iptables-restore command, here are some troubleshooting tips:

• Make sure the configuration file is in the correct format. The file must be in the format generated by the iptables-save command.
• Check the syntax of the configuration file for errors. The iptables-restore command will fail if there are syntax errors in the configuration file.
• Use the -n option to test the configuration file before applying it. This can help you identify any issues before they cause problems.

Notes

• The iptables-restore command is only used to restore the configuration of iptables tables. To configure iptables, you should use the iptables command.
• The configuration file used with the iptables-restore command must be in the correct format. If you want to modify the configuration file manually, you should use the iptables-save command to generate the initial configuration file.