Why can't I use the "ssl" modified on more than one listen statement?

[portante]

Hi,

The following is an example of how we would like to run our
configuration.

[code]
ssl_certificate      common.crt;
ssl_certificate_key  common.key;
 
server {
  listen           80;
  server_name      www.nginx.org;
  ...
}
 
server {
  listen           443 default ssl;
  server_name      secure.nginx.org;
  ...
}
 
server {
  listen           80;
  listen           443 ssl;
  server_name      images.nginx.org;
  include images.location;
}
[/code]

We encounter the following error trying to install the configuration:
[code]
[emerg]: a duplicate listen options for 0.0.0.0:443 in
/usr/local/etc/nginx/projects/proj.conf:19
[/code]

All of the server names are CNAMEs of one IP address.

If I do the following, it works:

[code]
ssl_certificate      common.crt;
ssl_certificate_key  common.key;
 
server {
  listen           80;
  server_name      www.nginx.org;
  ...
}
 
server {
  listen           443 default ssl;
  server_name      secure.nginx.org;
  ...
}
 
server {
  listen           80;
  server_name      images.nginx.org;
  include images.location;
}
 
server {
  listen           443;
  ssl on;
  server_name      images.nginx.org;
  include images.location;
}
[/code]

Why can I not specify like the first example above?

Thanks,
-peter

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,132621,132621#msg-132621