Client VPN slowness troubleshooting steps

0

I need guidance on troubleshooting steps for an issue reported by many users when they connect to client VPN endpoints with split tunneling enabled.

  1. Client VPN connections have been forcefully terminated and re-established, but this made no difference.
  2. Speed tests on the users' machines show no internet connectivity issues, with upload/download speeds exceeding 100 Mbps.
  3. Using MTR tools as per this article (https://repost.aws/knowledge-center/client-vpn-fix-packet-loss-latency) to test the client VPN endpoint revealed no packet loss, and response times were between 20-50 ms.
  4. VPN connection logs were not useful for this issue.
  5. Slowness was observed when running applications locally and connecting to various resources over the client VPN, such as cache and databases.
  6. general troubleshooting on client machine hasn't worked.

What additional steps can be taken to troubleshoot the slowness and improve performance?

  • please accept the answer if it was helpful

2 Answers
2

Here is a section with troubleshooting steps: https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/troubleshooting.html

https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/troubleshooting.html#test-throughput

The throughput depends on multiple factors, such as the capacity of your connection from your location, and the network latency between your Client VPN desktop application on your computer and the VPC endpoint. There is also a 10 Mbps bandwidth limit per user connection.

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EXPERT
answered 4 months ago
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EXPERT
reviewed 3 months ago
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EXPERT
reviewed 4 months ago
  • I've already reviewed the provided URL, and the only relevant information regarding VPN slowness is about verifying the bandwidth limit for a Client VPN endpoint. However, the provided command is for Linux systems. Since all our clients use Windows machines, this command isn't helpful for us. Is there a Windows equivalent to check the available bandwidth?

    Besides checking the bandwidth and the steps I've already taken, what other troubleshooting actions can be performed?

  • iperf is available for Windows as well https://iperf.fr/iperf-download.php

    or you can test it from web browser https://www.speedtest.net/

0

hello, You can use below sequence as well :

  • Test Internet Connection Speed
  • Check for Network Latency over public IP of Client VPN connection
  • Calculate theoretical throughout accordingly
  • Iperf test -Test with Different Devices/Networks: Have the user try connecting to the VPN from a different device or network to determine if the issue is specific to their setup or more widespread.
AWS
answered 4 months ago

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