How to simulate WebSocket failure on a macOS browser?

Question

I often deal with WebSocket failures, and debugging fixes is hard because I have not found a good way to simulate them. A lot of Linux tools are no longer available because macOS has now transitioned into using pf (the way I understand it; I'm a beginner at all this).

I've tried the native firewall, which doesn't seem to have enough control to block browser WebSockets only, and murus, which can probably do the trick, but I haven't been able to.

Are there any known ways to simulate WebSocket failures in a browser in order to debug fallbacks, etc?

Have a look at burp suite: https://portswigger.net/burp/communitydownload It can do several things, but I am not sure if it's the right tool. — davidbaumann, Nov 12 '19 at 16:54
@davidbaumann That worked! If you want to write it up as an answer I'll accept. — jorgen, Nov 13 '19 at 16:05

score 1 · Accepted Answer · answered Nov 13 '19 at 16:11

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Burp suite is the ultimate proxy to intercept and manipulate any connection that can use a proxy (socks/http/https...).

answered Nov 13 '19 at 16:11

davidbaumann

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How to simulate WebSocket failure on a macOS browser?

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