# =============================================================================
# easyIpTables.sh
# 
# Allows you to easily set IpTables mappings for incoming and outgoing ports.
# 
# Copyright (c) 2025 VELENDEU, eetnaviation
# 
# https://velend.eu/
# https://git.velend.eu/eetnaviation/shscripts
# 
# All rights reserved unless otherwise stated.
# 
# Permission is hereby denied to copy, modify, distribute, sublicense,
# or sell copies of this software without explicit prior written consent.
# 
# All dependency trademarks and names if included are subject to copyright
# of their respective owners.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
# =============================================================================

#!/bin/bash

while true; do
  echo "easyIpTables.sh // (c) Copyright 2025 VELENDEU , eetnaviation // See source for more info."
  echo "Press CTRL+C (^C) to quit."
  read -p "Enter outside port: " outsidePort
  read -p "Enter inside port: " insidePort

  if [[ "$outsidePort" =~ ^[0-9]+$ && "$insidePort" =~ ^[0-9]+$ ]]; then
    iptables -t nat -A PREROUTING -p tcp --dport "$outsidePort" -j REDIRECT --to-port "$insidePort"
    echo "Redirected TCP $outsidePort -> $insidePort, Here are your current IpTables mappings:"
    # Display all mappings
    iptables -t nat -L -v -n
  else
    echo "Invalid input, must be numeric ports."
  fi
done