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wavesmasher
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Aug 11, 2025
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Using LTM to hide an untrusted certificate

I'm new to F5/LTM, and I'm curious if this is possible. 

 

There's an appliance owned by a external vendor that uses a self-signed certificate. The appliance serves up an HTTPS web page on TCP port 443. 

The appliance also has a WebSocket (over TLS) connection on a different port.

I have network access to the appliance, but I'm not allowed to make any changes to its configuration.

Is there a way to have the client computer connect to the F5 with a trusted certificate, then have the F5 direct the request to the appliance without getting a cert error on the client?

 

The goal is to hide the untrusted certificate from the client. I only want the client to see the trusted certificate that's on the F5.

I want to do this for a secure HTTP connection and a WebSocket connection over TLS.

  • Hello,

     

    Yes its totally feasible.

    You will have to create 2 Virtual server.

    1 for https and 1 for websocket port.

    Both will present your valid certificate and reencrypt the traffic before sending it to the appliance.

    You will also need to apply a websocket profile.

2 Replies

  • Hello,

     

    Yes its totally feasible.

    You will have to create 2 Virtual server.

    1 for https and 1 for websocket port.

    Both will present your valid certificate and reencrypt the traffic before sending it to the appliance.

    You will also need to apply a websocket profile.

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