Load Balanced IIS behind ldirectord loadbalancer

Cluster Nodes Configurations (IIS6/7 Real Web Server Configuration)

1. Create text file by using Notepad and name it "check.txt"
2. Fill this file with "webserverisworking" string.
3. Move file to "C:\inetpub\wwwroot" or anywhere your web files are.

If you are using Windows XP/2003 IIS web server then you should do these steps:

1. Install "Microsoft Loopback Adapter" by using "Add Hardware" icon in Control Panel.
2. Set IP to 10.10.10.53
3. Set Subnet Mask to 255.255.255.0
4. Don't Set Gateway or DNS
5. Done!

If you are using Windows 2008 IIS web servers then you should do these steps:

1. Install "Microsoft Loopback Adapter" by using "Add Hardware" icon in Control Panel.
2. Set IP to 10.10.10.53
3. Set Subnet Mask to 255.255.255.0
4. Don't Set Gateway or DNS
5. Then you need to use the following command line magic :

netsh interface ipv4 set interface "net" weakhostreceive=enabled
netsh interface ipv4 set interface "loopback" weakhostreceive=enabled
netsh interface ipv4 set interface "loopback" weakhostsend=enabled

Note: Obviously first you will need to rename the specific adapters from the default of "Local Area Network Connection 1" to either "net" or "loopback" respectively i.e.

See following link for more information http://blog.loadbalancer.org/direct-server-return-on-windows-2008-using-loopback-adpter/

Src: http://www.howtoforge.com/efficient-high-available-loadbalanced-cluster-on-centos-5.3-direct-routing-method