Where to configure websockets with an application load balancer on AWS EC2?

Question

According to the AWS documentation, "WebSockets and Secure WebSockets support is available natively and ready for use on an Application Load Balancer."

However, when I select Application Load Balancer in EC2, I don't have any option other than HTTP and HTTPS:

I would like to use the secure websocket protocol (wss://) which I believe would be over TLS:8888.

How can I input this option?

Have a look at this [question](https://stackoverflow.com/questions/39336033/does-an-application-load-balancer-support-websockets). You have to use http or https for that. — Marcin, Nov 18 '20 at 22:49

score 1 · Accepted Answer · answered Nov 18 '20 at 23:00

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The solution was to use HTTPS for the listener protocol, even though the browser is making requests to wss://.

For port number, configuring both the listener and environment instance to port 8888 works.

answered Nov 18 '20 at 23:00

Tyler

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What rules did you set on the listener? e.g. "Forward" or "Return fixed response"? Also, did you create a Target Group as is suggested in this answer? https://stackoverflow.com/questions/39336033/does-an-application-load-balancer-support-websockets – ribbonwind Dec 06 '21 at 13:07
I have the same question ^^ – mcool Jan 28 '22 at 02:16
I wanna read too – Alejandro Reyes Mar 22 '22 at 05:34

score 0 · Answer 2 · answered Mar 24 '23 at 10:27

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Create a new Target Group with your port that websocket uses. Point that target group to the same EC2 instance.

Then create a new listener with websocket port and point the newly created Target Group.

This should work fine.

answered Mar 24 '23 at 10:27

NinjaMAN

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Where to configure websockets with an application load balancer on AWS EC2?

2 Answers2