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Step 14: Testing VPN Connections

After configuring your router and disabling source/destination checking, you should verify that the VPN tunnel is working correctly.

Verify VPN Tunnel Status in AWS

  1. Navigate to VPC Dashboard and select VPN Connections.
  1. Select your VPN connection (My-Company-VPN).
  1. Click the Tunnel Details tab.
  1. Verify that at least one tunnel shows Status: UP.

Note: It may take a few minutes for the tunnel to establish after router configuration.

Verify VPN Status on Your Router

  1. Log in to your router's administration interface.
  1. Navigate to the VPN status page.
  1. Verify the tunnel shows as connected or established.

Test Connectivity from Local Network

  1. Open Command Prompt on any Windows computer in your local network.
  1. Test connectivity to your Public-Server:

_CODE_BLOCK_0_

  1. Test connectivity to your Private-Server:

_CODE_BLOCK_1_

  1. Verify you receive responses from both addresses.

Expected Results

Test Expected Result
Ping 10.0.1.100 Replies from Public-Server
Ping 10.0.2.200 Replies from Private-Server
AWS tunnel status At least one tunnel UP
Router tunnel status Connected/Established

Test Remote Desktop Access

Once ping tests succeed, verify Remote Desktop connectivity:

  1. Open Remote Desktop Connection on a local computer.
  1. Connect to 10.0.1.100 (Public-Server).
  1. Verify you can log in successfully.
  1. From the Public-Server, connect to 10.0.2.200 (Private-Server).

Troubleshooting

Issue Possible Cause Solution
Tunnel shows DOWN Router not configured correctly Review router VPN settings
Ping times out Route tables not updated Verify VPN routes in route tables
Intermittent connectivity DPD settings issue Adjust Dead Peer Detection timing
One-way traffic only Source/Dest check enabled Verify check is disabled on all instances

Success Criteria

Your VPN configuration is complete when:

  • [x] AWS VPN tunnel shows UP status
  • [x] Router shows tunnel connected
  • [x] You can ping EC2 instances from local network
  • [x] You can RDP to EC2 instances from local network

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