diff --git a/README.md b/README.md
index 4335e1a..fce65f5 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,131 @@
 # Port-redirect-script
 
+```bash
+#!/bin/bash
+
+# Script to manage port redirections with extended system compatibility
+# Usage:
+#   ./script.sh add <port> [tcp|udp]     # defaults to both tcp and udp if not specified
+#   ./script.sh remove <port> [tcp|udp]  # defaults to both tcp and udp if not specified
+#   ./script.sh list
+#   ./script.sh check
+
+# Configuration
+DEST_IP="192.168.2.2"  # The internal IP to which traffic should be redirected
+INTERFACE="wg0"        # The outgoing interface used for MASQUERADE
+
+check_system() {
+    # Check for iptables and install if not present
+    if ! command -v iptables >/dev/null 2>&1; then
+        echo "iptables is not installed. Would you like to install it now? (y/n)"
+        read answer
+        if [[ "$answer" == "y" ]]; then
+            if [ -f "/etc/alpine-release" ]; then
+                apk add iptables
+            elif [ -f "/etc/debian_version" ]; then
+                apt-get update
+                apt-get install iptables
+            elif [ -f "/etc/fedora-release" ]; then
+                dnf install -y iptables
+            elif [ -f "/etc/arch-release" ]; then
+                pacman -Syu iptables
+            else
+                echo "Unsupported OS. Please install iptables manually."
+                exit 1
+            fi
+        else
+            echo "iptables is required for this script to function."
+            exit 1
+        fi
+    fi
+
+    # Check for startup script existence and setup if not present
+    if [ ! -f "/etc/local.d/iptables.start" ]; then
+        echo "Autostart script for iptables rules is not configured. Would you like to configure it now? (y/n)"
+        read answer
+        if [[ "$answer" == "y" ]]; then
+            echo '#!/bin/sh' > /etc/local.d/iptables.start
+            echo "iptables-restore < /etc/iptables/rules-save" >> /etc/local.d/iptables.start
+            chmod +x /etc/local.d/iptables.start
+            if [ -f "/etc/alpine-release" ]; then
+                rc-update add local default
+                rc-service local start
+            elif [ -f "/etc/fedora-release" ] || [ -f "/etc/arch-release" ]; then
+                systemctl enable rc-local.service
+                systemctl start rc-local.service
+            elif [ -f "/etc/debian_version" ]; then
+                systemctl enable rc-local.service
+                systemctl start rc-local.service
+            else
+                echo "Unsupported OS for autostart configuration."
+                exit 1
+            fi
+            echo "Startup script configured successfully."
+        else
+            echo "Autostart script is essential for persistent iptables rules."
+            exit 1
+        fi
+    fi
+}
+
+# Function to add port redirection
+add_port() {
+    local port=$1
+    local proto=${2:-"tcp udp"}  # Default to both TCP and UDP if not specified
+    for p in $proto; do
+        echo "Adding $p redirection for port: $port"
+        iptables -t nat -A PREROUTING -p $p --dport $port -j DNAT --to-destination $DEST_IP:$port
+        iptables -t nat -A POSTROUTING -o $INTERFACE -p $p --dport $port -d $DEST_IP -j MASQUERADE
+        echo "Redirection added for $p port $port."
+    done
+}
+
+# Function to remove port redirection
+remove_port() {
+    local port=$1
+    local proto=${2:-"tcp udp"}  # Default to both TCP and UDP if not specified
+    for p in $proto; do
+        echo "Removing $p redirection for port: $port"
+        iptables -t nat -D PREROUTING -p $p --dport $port -j DNAT --to-destination $DEST_IP:$port
+        iptables -t nat -D POSTROUTING -o $INTERFACE -p $p --dport $port -d $DEST_IP -j MASQUERADE
+        echo "Redirection removed for $p port $port."
+    done
+}
+
+# Function to list all port redirections
+list_redirects() {
+    echo "Listing all TCP and UDP port redirections:"
+    iptables -t nat -L PREROUTING --line-numbers -n
+    iptables -t nat -L POSTROUTING --line-numbers -n
+}
+
+# Main case logic
+case "$1" in
+    add|remove)
+        if [ "$#" -lt 2 ] || [ "$#" -gt 3 ]; then
+            echo "Invalid usage for $1"
+            echo "Usage: $0 $1 <port> [tcp|udp]"
+            exit 1
+        fi
+        check_system
+        "${1}_port" $2 $3
+        ;;
+    list)
+        check_system
+        list_redirects
+        ;;
+    check)
+        check_system
+        echo "System check completed."
+        ;;
+    *)
+        echo "Invalid command: $1"
+        echo "Usage: $0 {add|remove|list|check} <args>"
+        exit 1
+        ;;
+esac
+
+# Save the current iptables rules
+iptables-save > /etc/iptables/rules-save
+echo "Current iptables rules saved."
+```
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