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Load Balancing Virtual Servers, Pools, and Nodes

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One virtual server (virtual IP address) was configured. Itserves as the public Web site address (WWW 200.100.1.22:80). Onlyport 80 is open to help minimize the exposure of the server farmfrom the network level.

The two virtual servers are each associated with a loadbalancing pool. The public virtual server is associated with theload balancing pool that contains the front-end NIC addresses offront-end Web servers running Windows SharePoint Services. Thereare six front-end Web Servers, so six IP addresses were added tothe load balancing pool and only port 80 is open for public access.All front-end Web servers have the same priority and ratio.Predictive (Node Address) is the load balancing method set on F5BIG-IP controllers.

Even though the server farm configuration in this paper does notsupport SSL, the Internet Platform and Operations group tested SSLconfiguration in another Internet pre-production environment. IfSSL is required, port 443 can be opened on the router and BIG-IPlevels can be set to allow SSL traffic to come in. All otherinbound ports should be blocked to help provide a high level ofsecurity.

Note: Windows SharePointServices does not support terminating SSL on a switch or router.The URL that Microsoft Internet Information Services (IIS) receivesmust be the actual URL of the resource. Otherwise, links on thepages rendered by Windows SharePoint Services will beincorrect.

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