Website Domain Blocker

#!/bin/bash
######################################################################
#Copyright (C) 2023  Kris Occhipinti
#https://filmsbykris.com

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation version 3 of the License.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

url="https://filmsbykris.com/scripts/blocked_domains.lst"

function block(){

  wget -qO- "$url"|while read domain;
  do
    sudo iptables -A OUTPUT -p tcp -m string --string "$domain" --algo kmp -j REJECT
  done
  sudo iptables -L --line-numbers
  exit
}

function unblock(){
  rule="$(sudo iptables -L --line-numbers|grep REJECT|fzf --prompt="Select a rule: "|awk '{print $1}')"
  [[ $rule ]] || exit
  sudo iptables -D OUTPUT $rule
  sudo iptables -L --line-numbers
  exit
}

function unblock_all(){
  sudo iptables -L --line-numbers|grep "REJECT"|awk '{print $1}'|while read rule;do
    sudo iptables -D OUTPUT 1
  done
  sudo iptables -L --line-numbers
  exit
}

function help(){
  echo "
  Options are:
  unblock
  all
  show
  help
  block #default"
  exit
}

[[ "$1" == "unblock" ]] && unblock
[[ "$1" == "all" ]] && unblock_all
[[ "$1" == "show" ]] && sudo iptables -L --line-numbers
[[ "$1" == "help" ]] && help
block