JamesHopbourn · August 2, 2025 01:34
diff --git a/setup.md b/setup.md
diff --git a/setup_network.sh b/setup_network.sh
 #!/bin/bash

 # Network setup script for Gateway-Server-Client architecture
 # This script configures the network topology as described in the requirements

 echo "Starting network configuration..."

 # Start all VMs
 echo "Starting VMs..."
 multipass start gateway server client

 # Wait for VMs to be ready
 sleep 10

 echo "Configuring Gateway VM..."
 # Gateway configuration - enable IP forwarding and set up NAT
 multipass exec gateway -- sudo bash -c '
 # Enable IP forwarding
 echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
 sysctl -p

 # Install iptables-persistent to save rules
 apt update
 apt install -y iptables-persistent

 # Set up NAT rules for forwarding traffic
 # Allow forwarding from internal network to external
 iptables -t nat -A POSTROUTING -s 192.168.69.0/24 -o enp0s1 -j MASQUERADE
 iptables -A FORWARD -i enp0s1 -o enp0s1 -m state --state RELATED,ESTABLISHED -j ACCEPT
 iptables -A FORWARD -i enp0s1 -o enp0s1 -j ACCEPT

 # Allow traffic between VMs in the same subnet
 iptables -A INPUT -s 192.168.69.0/24 -j ACCEPT
 iptables -A FORWARD -s 192.168.69.0/24 -d 192.168.69.0/24 -j ACCEPT

 # Save iptables rules
 iptables-save > /etc/iptables/rules.v4

 echo "Gateway configuration completed"
 '

 echo "Configuring Server VM..."
 # Server configuration - set up Python service
 multipass exec server -- sudo bash -c '
 # Update package list and install Python3
 apt update
 apt install -y python3 python3-pip

 # Create a simple web service
 cat > /home/ubuntu/server.py << EOF
 #!/usr/bin/env python3
 import http.server
 import socketserver
 import os

 PORT = 8000

 class MyHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.send_header("Content-type", "text/html")
        self.end_headers()
        
        response = f"""
        <html>
        <head><title>Network Lab Server</title></head>
        <body>
        <h1>Hello from Server!</h1>
        <p>Server IP: {os.popen("hostname -I").read().strip()}</p>
        <p>You have successfully accessed the server through the gateway!</p>
        <p>Request from: {self.client_address[0]}</p>
        </body>
        </html>
        """
        self.wfile.write(response.encode())

 with socketserver.TCPServer(("", PORT), MyHTTPRequestHandler) as httpd:
    print(f"Server running on port {PORT}")
    print(f"Server IP: {os.popen("hostname -I").read().strip()}")
    httpd.serve_forever()
 EOF

 chmod +x /home/ubuntu/server.py

 # Create systemd service for auto-start
 cat > /etc/systemd/system/webserver.service << EOF
 [Unit]
 Description=Python Web Server
 After=network.target

 [Service]
 Type=simple
 User=ubuntu
 WorkingDirectory=/home/ubuntu
 ExecStart=/usr/bin/python3 /home/ubuntu/server.py
 Restart=always

 [Install]
 WantedBy=multi-user.target
 EOF

 systemctl enable webserver.service
 systemctl start webserver.service

 echo "Server configuration completed"
 '

 echo "Configuring Client VM..."
 # Client configuration
 multipass exec client -- sudo bash -c '
 # Install curl and network tools for testing
 apt update
 apt install -y curl traceroute net-tools

 echo "Client configuration completed"
 '

 echo "Network configuration completed!"
 echo "You can now test the setup by running:"
 echo "multipass exec client -- curl http://$(multipass info server | grep IPv4 | awk '{print $2}'):8000"
diff --git a/test_network.sh b/test_network.sh
 #!/bin/bash

 echo "========================================="
 echo "Network Environment Test Script"
 echo "========================================="
 echo

 echo "1. Testing VMs status:"
 multipass list
 echo

 echo "2. Testing connectivity from Client to Server:"
 echo "Client -> Server (HTTP):"
 multipass exec client -- curl -s http://192.168.69.23:8000
 echo
 echo

 echo "3. Testing route tracing:"
 echo "Traceroute from Client to Server:"
 multipass exec client -- traceroute 192.168.69.23
 echo

 echo "4. Testing Gateway routing configuration:"
 echo "Gateway IP forwarding status:"
 multipass exec gateway -- sysctl net.ipv4.ip_forward
 echo

 echo "Gateway iptables NAT rules:"
 multipass exec gateway -- sudo iptables -t nat -L POSTROUTING
 echo

 echo "5. Testing Server service:"
 echo "Server processes:"
 multipass exec server -- ps aux | grep python
 echo

 echo "6. Network configuration summary:"
 echo "Gateway IP: $(multipass info gateway | grep IPv4 | awk '{print $2}')"
 echo "Server IP:  $(multipass info server | grep IPv4 | awk '{print $2}')"
 echo "Client IP:  $(multipass info client | grep IPv4 | awk '{print $2}')"
 echo

 echo "========================================="
 echo "Network Environment Setup Complete!"
 echo "========================================="
 echo
 echo "Test commands you can run:"
 echo "multipass exec client -- curl http://192.168.69.23:8000"
 echo "multipass exec client -- traceroute 192.168.69.23"
 echo "multipass exec gateway -- sudo iptables -L"
 echo
diff --git a/需求文档.md b/需求文档.md
	#!/bin/bash

	# Network setup script for Gateway-Server-Client architecture
	# This script configures the network topology as described in the requirements

	echo "Starting network configuration..."

	# Start all VMs
	echo "Starting VMs..."
	multipass start gateway server client

	# Wait for VMs to be ready
	sleep 10

	echo "Configuring Gateway VM..."
	# Gateway configuration - enable IP forwarding and set up NAT
	multipass exec gateway -- sudo bash -c '
	# Enable IP forwarding
	echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
	sysctl -p

	# Install iptables-persistent to save rules
	apt update
	apt install -y iptables-persistent

	# Set up NAT rules for forwarding traffic
	# Allow forwarding from internal network to external
	iptables -t nat -A POSTROUTING -s 192.168.69.0/24 -o enp0s1 -j MASQUERADE
	iptables -A FORWARD -i enp0s1 -o enp0s1 -m state --state RELATED,ESTABLISHED -j ACCEPT
	iptables -A FORWARD -i enp0s1 -o enp0s1 -j ACCEPT

	# Allow traffic between VMs in the same subnet
	iptables -A INPUT -s 192.168.69.0/24 -j ACCEPT
	iptables -A FORWARD -s 192.168.69.0/24 -d 192.168.69.0/24 -j ACCEPT

	# Save iptables rules
	iptables-save > /etc/iptables/rules.v4

	echo "Gateway configuration completed"
	'

	echo "Configuring Server VM..."
	# Server configuration - set up Python service
	multipass exec server -- sudo bash -c '
	# Update package list and install Python3
	apt update
	apt install -y python3 python3-pip

	# Create a simple web service
	cat > /home/ubuntu/server.py << EOF
	#!/usr/bin/env python3
	import http.server
	import socketserver
	import os

	PORT = 8000

	class MyHTTPRequestHandler(http.server.SimpleHTTPRequestHandler):
	def do_GET(self):
	self.send_response(200)
	self.send_header("Content-type", "text/html")
	self.end_headers()

	response = f"""
	<html>
	<head><title>Network Lab Server</title></head>
	<body>
	<h1>Hello from Server!</h1>
	<p>Server IP: {os.popen("hostname -I").read().strip()}</p>
	<p>You have successfully accessed the server through the gateway!</p>
	<p>Request from: {self.client_address[0]}</p>
	</body>
	</html>
	"""
	self.wfile.write(response.encode())

	with socketserver.TCPServer(("", PORT), MyHTTPRequestHandler) as httpd:
	print(f"Server running on port {PORT}")
	print(f"Server IP: {os.popen("hostname -I").read().strip()}")
	httpd.serve_forever()
	EOF

	chmod +x /home/ubuntu/server.py

	# Create systemd service for auto-start
	cat > /etc/systemd/system/webserver.service << EOF
	[Unit]
	Description=Python Web Server
	After=network.target

	[Service]
	Type=simple
	User=ubuntu
	WorkingDirectory=/home/ubuntu
	ExecStart=/usr/bin/python3 /home/ubuntu/server.py
	Restart=always

	[Install]
	WantedBy=multi-user.target
	EOF

	systemctl enable webserver.service
	systemctl start webserver.service

	echo "Server configuration completed"
	'

	echo "Configuring Client VM..."
	# Client configuration
	multipass exec client -- sudo bash -c '
	# Install curl and network tools for testing
	apt update
	apt install -y curl traceroute net-tools

	echo "Client configuration completed"
	'

	echo "Network configuration completed!"
	echo "You can now test the setup by running:"
	echo "multipass exec client -- curl http://$(multipass info server \| grep IPv4 \| awk '{print $2}'):8000"
	#!/bin/bash

	echo "========================================="
	echo "Network Environment Test Script"
	echo "========================================="
	echo

	echo "1. Testing VMs status:"
	multipass list
	echo

	echo "2. Testing connectivity from Client to Server:"
	echo "Client -> Server (HTTP):"
	multipass exec client -- curl -s http://192.168.69.23:8000
	echo
	echo

	echo "3. Testing route tracing:"
	echo "Traceroute from Client to Server:"
	multipass exec client -- traceroute 192.168.69.23
	echo

	echo "4. Testing Gateway routing configuration:"
	echo "Gateway IP forwarding status:"
	multipass exec gateway -- sysctl net.ipv4.ip_forward
	echo

	echo "Gateway iptables NAT rules:"
	multipass exec gateway -- sudo iptables -t nat -L POSTROUTING
	echo

	echo "5. Testing Server service:"
	echo "Server processes:"
	multipass exec server -- ps aux \| grep python
	echo

	echo "6. Network configuration summary:"
	echo "Gateway IP: $(multipass info gateway \| grep IPv4 \| awk '{print $2}')"
	echo "Server IP: $(multipass info server \| grep IPv4 \| awk '{print $2}')"
	echo "Client IP: $(multipass info client \| grep IPv4 \| awk '{print $2}')"
	echo

	echo "========================================="
	echo "Network Environment Setup Complete!"
	echo "========================================="
	echo
	echo "Test commands you can run:"
	echo "multipass exec client -- curl http://192.168.69.23:8000"
	echo "multipass exec client -- traceroute 192.168.69.23"
	echo "multipass exec gateway -- sudo iptables -L"
	echo
角色	名称	功能描述
Gateway	`gateway`	路由转发、NAT 中继
Server	`server`	运行 Python 服务
Client	`client`	访问服务的客户端