How to set Backend in Varnish Cache for a remote Shared hosting?

Question

I want to use my server (where it's installed Varnished) to cache webpage of a remote web hosting

Default.vcl

backend default {
    .host = "shavrea.com";
    .port = "80";
}

If a write this, doesn't work and return me this error:

Site Temporarily Unavailable

We apologize for the inconvenience. Please contact the webmaster/ tech support immediately to have them rectify this.
error id: "bad_httpd_conf"

This is because that backend is on a shared server. How to resolve this?

Answer 1

try to explicitly set the Host header.

sub vcl_recv {
  set req.http.host = "shavrea.com";
}