Read IP address from text file to IPTABLES

Question

Currently I am using ufw to manually add the ip rules by typing

sudo ufw allow from (my ip address)

I have retrieve the ip address of my client ip by doing some script calling from my database and save it to a .txt file.

this is the value i get

  ipaddress
 10.1.100.90
 10.1.100.91

Is it possible to read the ip address in the .txt file and save it to the rule instead of typing manually?

Answer 1

You could use a bash script like something below

#!/bin/bash

{ 
    # Skip the header line containing 'name  ipaddress'
    read skipLine;                     

    # Read the rest of the lines till end of the file
    while IFS= read -r name IP
    do
        # All the IP's are stored in the variable $IP. Use it
        # however you want
        printf  "%s %s\n" "$name" "$IP"

        # To print only the IPs, do
        # printf  "%s\n" "$IP"

    done
} <IPFile 

# IPFile - Input file name containing IP addresses. Replace it with your file