The Varnish docs state that Varnish is configured by default on port 6081, which is "great for testing purposes." https://www.varnish-cache.org/docs/trunk/tutorial/putting_varnish_on_port_80.html
I am running multiple virtual hosts, and while I'm becoming familiar with Varnish, I'd like to keep it on :6081.
I changed my default.vcl .host to be
I assumed that I could test varnish through :6081, listening to the backend server at the default :80 port all the while the rest of the world would still continue to receive the non varnish version as they normally would on port 80.
However, I keep getting the following error: "Error 503 Backend fetch failed"
What could I be doing wrong? I went through the tutorial and everything worked as the tutorial indicated.