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#!/bin/bash

# Script to set up network sharing with static IP



# Define network interfaces and IP addresses

LAN_INTERFACE="eth0"

WIFI_INTERFACE="wlan0"

LAN_IP="192.168.0.1"

DHCP_RANGE="192.168.0.10,192.168.0.50,12h"



# Enable IP forwarding

sysctl net.ipv4.ip_forward=1



# Set up iptables rules

iptables -A POSTROUTING -t nat -o $WIFI_INTERFACE -j MASQUERADE

iptables -A FORWARD -i $WIFI_INTERFACE -o $LAN_INTERFACE -m state --state RELATED,ESTABLISHED -j ACCEPT

iptables -A FORWARD -i $LAN_INTERFACE -o $WIFI_INTERFACE -j ACCEPT



# Start dnsmasq

service dnsmasq start

service dnsmasq restart



# Save iptables rules

iptables-save | tee /etc/iptables.rules



# Configure static IP for LAN interface

ifconfig $LAN_INTERFACE $LAN_IP

echo "interface $LAN_INTERFACE" >> /etc/dnsmasq.conf

echo "dhcp-range=$LAN_IP,$DHCP_RANGE" >> /etc/dnsmasq.conf

注意端口占用，需要kill