Operational Security Protocol System

#!/bin/bash

# Advanced Network Management Tool

function display_basic_info() {
  clear
  echo -e "\e[1;34mAdvanced Network Management Tool\e[0m\n"
  echo "Hostname: $(hostname)"
  echo "Kernel version: $(uname -r)"
  echo "----------"
  echo "Network interfaces:"
  ifconfig -a
  echo "----------"
  echo "Routing table:"
  route -n
  echo "----------"
  echo "DNS servers:"
  cat /etc/resolv.conf
  echo "----------"
  echo "Listening ports:"
  netstat -tulpn
  echo -e "\nPress enter to return to the main menu."
  read -r
}

function configure_network_interface() {
  clear
  echo -e "\e[1;34mAdvanced Network Management Tool\e[0m\n"
  echo "Enter the name of the network interface to configure:"
  read interface_name

  if [[ -z "$interface_name" ]]; then
    echo "Interface name cannot be empty."
    read -r
    return
  fi

  PS3="Choose an action for $interface_name: "
  actions=("Set IP address and subnet mask" "Set gateway" "Restart network interface" "Enable/Disable interface" "View interface details" "Cancel")
  select action in "${actions[@]}"; do
    case $action in
      "Set IP address and subnet mask")
        echo "Enter new IP address and subnet mask (e.g., 192.168.1.2/24):"
        read ip_address
        if [[ -n "$ip_address" ]]; then
          ifconfig $interface_name $ip_address
        else
          echo "IP address cannot be empty."
        fi
        ;;
      "Set gateway")
        echo "Enter new gateway IP address:"
        read gateway
        if [[ -n "$gateway" ]]; then
          route add default gw $gateway $interface_name
        else
          echo "Gateway IP address cannot be empty."
        fi
        ;;
      "Restart network interface")
        echo "Restarting network interface $interface_name..."
        ifdown $interface_name && ifup $interface_name
        ;;
      "Enable/Disable interface")
        PS3="Choose action for interface $interface_name: "
        enable_actions=("Enable" "Disable" "Cancel")
        select enable_choice in "${enable_actions[@]}"; do
          case $enable_choice in
            "Enable")
              ifconfig $interface_name up
              ;;
            "Disable")
              ifconfig $interface_name down
              ;;
            "Cancel")
              break
              ;;
            *)
              echo "Invalid choice."
              ;;
          esac
          break
        done
        ;;
      "View interface details")
        echo "Details for interface $interface_name:"
        ifconfig $interface_name
        ;;
      "Cancel")
        break
        ;;
      *)
        echo "Invalid choice."
        ;;
    esac
    break
  done
  read -r
}

function create_captive_portal() {
  clear
  echo -e "\e[1;34mAdvanced Network Management Tool\e[0m\n"
  echo "Enter the network interface for the captive portal:"
  read portal_interface

  if [[ -z "$portal_interface" ]]; then
    echo "Interface name cannot be empty."
    read -r
    return
  fi

  echo "Enter the URL to redirect users (e.g., http://captive-portal.com):"
  read portal_url

  if [[ -z "$portal_url" ]]; then
    echo "Portal URL cannot be empty."
    read -r
    return
  fi

  echo "Creating captive portal on $portal_interface..."
  iptables -t nat -A PREROUTING -i $portal_interface -p tcp --dport 80 -j DNAT --to-destination $portal_url:80
  iptables -t nat -A POSTROUTING -j MASQUERADE
  echo -e "\nCaptive portal created successfully.\nPress enter to return to the main menu."
  read -r
}

function utilize_loopback_localhost() {
  clear
  echo -e "\e[1;34mAdvanced Network Management Tool\e[0m\n"
  PS3="Choose an action for loopback and localhost: "
  loopback_actions=("Share internet connection with loopback" "Simulate printer for HTTP traffic masking" "Cancel")
  select loopback_choice in "${loopback_actions[@]}"; do
    case $loopback_choice in
      "Share internet connection with loopback")
        echo "Sharing internet connection with loopback..."
        iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
        ;;
      "Simulate printer for HTTP traffic masking")
        echo "Simulating printer for HTTP traffic masking..."
        iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to-port 8080
        ;;
      "Cancel")
        break
        ;;
      *)
        echo "Invalid choice."
        ;;
    esac
    break
  done
  read -r
}

function configure_microsegmentation() {
  clear
  echo -e "\e[1;34mAdvanced Network Management Tool\e[0m\n"
  echo "Enter the subnet for microsegmentation (e.g., 192.168.2.0/24):"
  read subnet

  if [[ -z "$subnet" ]]; then
    echo "Subnet cannot be empty."
    read -r
    return
  fi

  echo "Enter the network interface for microsegmentation:"
  read microsegment_interface

  if [[ -z "$microsegment_interface" ]]; then
    echo "Interface name cannot be empty."
    read -r
    return
  fi

  echo "Configuring microsegmentation on $microsegment_interface for $subnet..."
  iptables -A FORWARD -i $microsegment_interface -s $subnet -j ACCEPT
  iptables -A FORWARD -o $microsegment_interface -d $subnet -j ACCEPT
  echo -e "\nMicrosegmentation configured successfully.\nPress enter to return to the main menu."
  read -r
}

function display_help() {
  clear
  echo -e "\e[1;34mAdvanced Network Management Tool - Help Menu\e[0m\n"
  echo "1. Display basic network information: Displays information about the host, kernel, network interfaces, routing table, DNS servers, and listening ports."
  echo "2. Configure network interface: Allows configuration of a network interface, including setting IP address, gateway, restarting, enabling/disabling, and viewing details."
  echo "3. Create captive portal: Sets up a captive portal on a specified network interface, redirecting users to a provided URL."
  echo "4. Utilize loopback and localhost: Provides options to share the internet connection with loopback or simulate a printer for HTTP traffic masking."
  echo "5. Configure microsegmentation: Enables microsegmentation for a specified subnet on a network interface."
  echo "6. Exit: Exits the tool."

  echo -e "\nExamples:"
  echo "  To display basic network information: Choose option 1 from the main menu."
  echo "  To configure a network interface: Choose option 2 and follow the prompts."
  echo "  To create a captive portal: Choose option 3 and provide the required information."
  echo "  To utilize loopback and localhost: Choose option 4 and select the desired action."
  echo "  To configure microsegmentation: Choose option 5 and provide the subnet and interface details."
  echo -e "  To exit: Choose option 6 from the main menu.\nPress enter to return to the main menu."
  read -r
}

function main_menu() {
  while true; do
    clear
    echo -e "\e[1;34mAdvanced Network Management Tool\e[0m\n"
    PS3="Select an option: "
    main_actions=("Display basic network information" "Configure network interface" "Create captive portal" "Utilize loopback and localhost" "Configure microsegmentation" "Help" "Exit")
    select main_choice in "${main_actions[@]}"; do
      case $main_choice in
        "Display basic network information")
          display_basic_info
          ;;
        "Configure network interface")
          configure_network_interface
          ;;
        "Create captive portal")
          create_captive_portal
          ;;
        "Utilize loopback and localhost")
          utilize_loopback_localhost
          ;;
        "Configure microsegmentation")
          configure_microsegmentation
          ;;
        "Help")
          display_help
          ;;
        "Exit")
          echo "Exiting..."
          exit 0
          ;;
        *)
          echo "Invalid choice."
          ;;
      esac
    done
  done
}

main_menu