The IP addresses are fine, they are configured correctly on the host as far as I (and our hosting company) can verify.

> Have you read this
> http://nginx.org/en/docs/http/configuring_https_servers.html
> ?

I take it you mean this section:
[quote]
The oldest and most robust method to resolve the issue is to assign a separate IP address for every HTTPS server:

server {
listen 192.168.1.1:443;
server_name www.nginx.com;
ssl on;
ssl_certificate www.nginx.com.crt;
...
}

server {
listen 192.168.1.2:443;
server_name www.nginx.org;
ssl on;
ssl_certificate www.nginx.org.crt;
...
}
[/quote]

Which is what I've been trying to do. Unless you mean some other specific part of that page ?