Microsoft Internet Information Services (IIS) is a high performance, flexible web server created by Microsoft for use with Windows. In order for web sites to remain available, IT managers will need to configure IIS server load balancing. Loadbalancer.org supports Microsoft IIS with all common load balancing methods, incorporating numerous modifications and customisations to suit your requirements and can be deployed physically, virtually or in the cloud. Whatever your preference, we’ll ensure that your deployment is suited for your environment.
Example HTTPS deployment illustrating SSL termination, WAF traffic inspection and SSL re-encryption.
Protocols and load balancing methods for Microsoft IIS
|Protocol||Port||Load balancing methods|
|HTTP||80||Layer 7 SNAT (Recommended) Using Reverse Proxy mode is the easiest and most flexible load balancing method, offering advanced URL switching, cookie insertion and WAF capabilities.
Layer 4 DR Direct Routing has the advantage of being fully transparent and seriously fast but requires solving the arp problem.
Layer 4 NAT Traditional NAT mode gives easy to implement fast and transparent load balancing but usually requires a two-arm configuration (two subnets).
|HTTPS||443||All load balancing methods can be easily configured for SSL Pass-through.
This has the advantage of being fast, secure and easy to maintain. Identical SSL certificates will need to exist on each of your backend servers for pass-through security.
SSL Termination or off-loading must be used when advanced Layer 7 functionality such as cookies or URL switching is required. You can also implement SNI if you have multiple domain certificates one one public IP address. Optional re-encryption is also available between the load balancer and IIS.
|FTP||20,21||All load balancing methods can be easily configured for FTP. However the original design of FTP did not work well with firewalls so it was modified to add a special PASV (Passive) mode. If you are load balancing FTP we recommend that you configure PASV on the FTP server, or use Layer 4 NAT mode which handles the issue automatically.|
|SFTP||21||All load balancing methods can be easily configured for SFTP.|
One of Europe’s leading research universities, Eindhoven University of Technology, has called on Loadbalancer.org to ensure that its main website – where students, researchers and businesses first interact with the University – is highly available and is fast to navigate.