The Global settings section allows you to change various elements, including the SSL cryptographic library.
Host Cache Timer
The Host Cache Timer is a setting that stores the IP Address of a Real Server for a given period when the domain name has been used instead of an IP Address. The cache is flushed upon a Real Server failure. Setting this value to zero will prevent the cache from being flushed. There is no max value for this setting.
Drain
The Drain feature is configurable for each Real Server linked to a Virtual Service. By default, the Drain Clears Persistence setting is enabled, allowing servers that are placed in Drain mode to end sessions gracefully so that they can be taken offline for maintenance.
SSL
This global setting allows the SSL library to be changed as needed. The default SSL Cryptographic Library used by the ADC is from OpenSSL. If you wanted to use a different crypto library, this could be changed here.
