Varnish config

Hi,

I have contacted my webhost and they have confirmed my 406 issue is down to varnish (by testing with varnish on and off).

They have directed me too their console with a tutorial here; https://support.cloudways.com/how-to-include-or-exclude-cookies-from-varnish/

I would be so grateful if anyone could advise what needs to be put in those fields to get WSL working.

Thanks in advance