SSL and Varnish

We setup all varnish boxes where we need SSL with 
nginx on :443 and varnishd on :80. 

The local nginx server proxy-passes everything to localhost:80, 
with the following config bit: 

server { 
ssl on; 
ssl_certificate /etc/ssl/certs/your.crt; 
ssl_certificate_key /etc/ssl/private/your.key; 
listen 443 default ssl; 

access_log /var/log/nginx/access.log; 
error_log /var/log/nginx/error.log; 

# Proxy any requests to the local varnish instance 
location / { 
proxy_set_header "Host:" $host; 
proxy_set_header "X-Forwarded-For" $proxy_add_x_forwarded_for; 
proxy_pass http://localhost:80; 
} 
}