The Load Balancer does not do any NAT (network address translation). Connections to the back-end machines will come from the load balancer itself.
With HTTP, the balancer inserts the header X-Cluster-Client-IP which is set to the originating IP address, so any web server will be able to log connections properly. For example, to make Apache log the correct IP address of each client, you can add the following to your Apache configuration file:
LogFormat "%{X-Cluster-Client-Ip}i%l %u \"%r\" %s %b"
With HTTPS, the balancer can only send the client IP address if you are using Zeus Web Servers as the back-ends. This will be automatically be configured on installation of the web servers if you specified that you were using Zeus Load Balancer. If you are adding Zeus Load Balancer to an existing cluster, you will need to add the tunable balancer!enabled yes to each web server's global.cfg file.
