Konfigurasi VPN Server Pada Cisco Packet Tracer

Introduction

This tutorial will guide you through the process of configuring a VPN server using Cisco Packet Tracer. A Virtual Private Network (VPN) allows secure connections over public networks, giving users access to a local area network (LAN) as if they were physically present in it. This setup is crucial for secure communications and remote access.

Step 1: Setting Up Cisco Packet Tracer

1. Open Cisco Packet Tracer: Launch the application on your computer.
2. Create a New File: Start a new project by clicking on 'File' and selecting 'New'.
3. Add Devices:
   • Drag and drop the necessary devices onto the workspace. Typically, you will need:
     • Routers
     • PCs (to serve as clients)
     • Switches (if required)
4. Connect Devices: Use the appropriate cables to connect all devices in your network. Ensure that routers and switches are properly linked to the PCs.

Step 2: Configure the Router for VPN

1. Access the Router CLI: Click on the router and navigate to the CLI tab.
2. Enter Configuration Mode: Type the following command:

   enable
   configure terminal
   

3. Create a VPN Configuration:
   • Define the VPN using the following commands:

   crypto isakmp policy 10
   encr aes
   authentication pre-share
   group 2
   

   • Set the pre-shared key:

   crypto isakmp key <your_pre_shared_key> address <client_ip_address>
   

Step 3: Configure the IPsec VPN

1. Define the Transform Set:

   crypto ipsec transform-set MYSET esp-aes esp-sha-hmac
   

2. Create the Crypto Map:

   crypto map VPN-MAP 10 ipsec-isakmp
   set peer <peer_ip_address>
   set transform-set MYSET
   match address 101
   

3. Apply the Crypto Map to the Interface:
   • Specify the outbound interface:

   interface <interface_name>
   crypto map VPN-MAP
   

Step 4: Configure Access Control Lists (ACL)

1. Create an Access List:

   access-list 101 permit ip <source_network> <wildcard_mask> <destination_network> <wildcard_mask>
   

2. Verify the Configuration: Ensure that you have configured the ACL correctly by using:

   show access-lists
   

Step 5: Test the VPN Connection

1. Ping between Devices: Use the ping command from one PC to another to test connectivity.
2. Check the VPN Status: Use the following command to check the status of the VPN:

   show crypto isakmp sa
   show crypto ipsec sa
   

Conclusion

In this tutorial, we covered the essential steps to configure a VPN server using Cisco Packet Tracer, including router configuration, IPsec setup, and testing the connection. Properly configuring a VPN enhances security and allows remote access to your local network. For further learning, consider exploring advanced VPN configurations or integrating additional security measures.