Linux Iptables: Add / Delete An IP Address Remotely Using A Shell Script

Iptables is a firewall utility in Linux that allows you to filter network traffic based on various criteria, such as the source or destination IP address, the protocol, or the port number. You can use iptables to block or allow traffic from specific IP addresses or ranges of IP addresses.

To add or delete an IP address from the iptables firewall remotely using a shell script, you can use the "iptables" command in the script. Here's an example of a shell script that adds an IP address to the iptables firewall:

#!/bin/bash

# Add the IP address to the iptables firewall
iptables -A INPUT -s IP_ADDRESS -j ACCEPT

# Save the iptables configuration
service iptables save

Replace "IP_ADDRESS" with the actual IP address that you want to add.

To delete an IP address from the iptables firewall, you can use the following script:

#!/bin/bash

# Delete the IP address from the iptables firewall
iptables -D INPUT -s IP_ADDRESS -j ACCEPT

# Save the iptables configuration
service iptables save

Replace "IP_ADDRESS" with the actual IP address that you want to delete.

Note: These scripts assume that the iptables service is running on the system and that you have the necessary permissions to modify the iptables configuration. Make sure to test the scripts before using them in a production environment.