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AndyC_128552's avatar
AndyC_128552
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Sep 18, 2014

How to set up web socket comms on LTM V11.5

Hello,

 

I am looking to use our LTM v11.5 to balance traffic for our mobile device web services which utilise the "Node.js" web socket services, but I just can't seem to get it to work correctly.

 

The initial call in works but the web socket communication doesn't get established and faults.

 

I have read that we needed to update our firmware to 11.5 for support of web sockets and then that we should use a http profile, no other guidance can I find!

 

Could someone please provide me with a step-by-step process of how to allow web socket communication to occur please?

 

We are making the communication using port 443/SSL.

 

Many thanks for any help provided.

 

APM
application delivery
design
LTM
security

4 Replies

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  • AndyC_128552's avatar
    AndyC_128552
    Icon for Nimbostratus rankNimbostratus
    Sep 18, 2014

    Hello,

    Thanks you very much for your response.

I think I need to explicitly define what is meant by a "HTTP" profile as I am no expert on configuring the LTM but do know my way around it.

I have set up a virtual server with:

Type - Standard
Service Port - 443 /HTTPS
Protocol - TCP
HTTP Profile - None
Source Address Translation - Auto-Map

The rest is as per default, there is no persistence or Connect-one profile in place and I only have one of the servers enabled in the 2 server pool to allow me to diagnose this without having to follow server connections.

The problem is like the web service hears the request but it can't set-up the web socket correctly (internal service fault). The service works fine if run locally on the server, not including the LTM in the call.

    Thanks

    • BinaryCanary_19's avatar
      BinaryCanary_19
      Historic F5 Account
      Sep 19, 2014
      Also, internal service fault on the webserver? You'll get better information in the server's logs.