You may need to Listen multiple IP addresses to be served for a domain, just add like following configuration.

Open a nginx.conf file by text editor vim or vi,

#  vim /etc/nginx/nginx.conf


server {

          listen 192.168.0.100:80;

            listen 192.168.0.200:80;

          server_name www.domainname.com;

          access_log /var/log/nginx/logs/access.log combined;

          error_log /var/log/nginx/logs/error.log warn;

          ...

}


Once configured on file restart your NGINX server,
 
# /etc/init.d/nginx restart

Note : If you are managing mutliple virtual hosts on nginx server configure on that file.