Websocket support on ProxySG software.
ProxySG software supports websockets over HTTP/1.1 in SGOS 6.7 and 7.3.
HTTP/2 is supported in 7.x, however websockets over HTTP/2 is not supported.
To address sites using websockets over HTTP/2, you will need to create policy to downgrade the HTTP requests to HTTP/1.1
For example, if site abc123.com is using websockets over HTTP/2 you would need the following policy to get site abc123.com to work through the ProxySG:
client.connection.ssl_server_name.substring=abc123.com http2.client.accept(no) http2.server.request(no)
or you can maintain a list like so:
condition=Websocket_Sites http2.client.accept(no) http2.server.request(no)
define condition Websocket_Sites
where the domains above are using websocket connections over HTTP/2