Reverse proxies and load balancers are servers that act as 'front-end' web servers through which all clients connect to 'back-end' servers. A reverse proxy system refers to a single back-end server, unlike a load balancing system which refers to many back-end servers.
Download and Instal Apache HTTP Server
A. Navigate to the Apache HTTP Server Project Download page. B. Select the appropriate link based on platform and version (32-bit or 64-bit) and save the file. C. Run the installation process.
On the Apache Server installation, replace the highlighted values in the file below with the ArcGIS Server machine name.
• For Windows: Start > Run > Services.msc > Apache Server > Restart