My Varnish configuration

varnish-config.vcl

#
# My varnish config
# caches all static files (images, js, css, txt, flash)
# but requests from backend dinamic content
#

# webserver
backend default {
  .host = "127.0.0.1";
  .port = "8080";
}

# what files to cache
sub vcl_recv {
  if (req.url ~ "\.(png|gif|jpg|ico|txt|swf|css|js)$") {
    return(lookup);
  }
}

# strip the cookie before the image is inserted into cache.
sub vcl_fetch {
  if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
    unset beresp.http.set-cookie;
  }
}

# add response header to see if document was cached
sub vcl_deliver {
  if (obj.hits > 0) {
    set resp.http.X-Cache = "HIT";
  } else {
    set resp.http.X-Cache = "MISS";
  }
}