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Restrict AWS Client VPN Access

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We already have a AWS Client VPN Setup, which is working as expected.

My On Prem team is able to connect with AWS Client VPN and access Cloud Resources.

Now my management wants to restrict AWS Client VPN access from our corporate office only.

I tried it by making changes to Security Group associated with my AWS Client VPN endpoint by allowing only access from our corporate office CIDR. But when I tested, it is not working as expected, my other team members was able to access the EC2 over VPN from outside our on-premises network.

Even I tried keeping the entire in-bound rule as blank, but still I was able to SSH into my EC2 instance.

Is there a way, to restrict access for AWS Client VPN, so that it is accessible only from my corporate office, or a way to restrict that the traffic going from VPN should only be from my on-premises network.

Topics
Networking & Content Delivery
Tags
Amazon VPCNetworking & Content DeliverySecurity GroupAWS Client VPN
Language
English
Shivkumar
asked 3 months ago358 views
1 Answer
2
Accepted Answer

Hello.

By enabling the client connect handler and creating a Lambda that rejects connections other than a specific public IPv4 address, you can limit connections to only those from the office.
https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/connection-authorization.html

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Riku_Kobayashi
answered 3 months ago
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Oleksii Bebych
reviewed 3 months ago
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Gary Mclean
reviewed 3 months ago
  • Shivkumar
    3 months ago

    Thanks Riku for the prompt response, allow me to check this implementation and get back to you.

  • Shivkumar
    3 months ago

    Hello Riku, it is working as expected, but one small question, then what is the use of the firewall associated with the AWS Client VPN? Which traffic it is controlling?

  • Riku_Kobayashi EXPERT
    3 months ago

    It may be used to control which AWS resources a user can access as described in the following documentation: https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/security-best-practices.html

    Use security groups to control which resources users can access in your VPC. For more information, see Security groups.

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