The attached documents describe how to setup ProxySG to authenticate iOS devices with pre-installed certificates. The documents only cover basic ProxySG configuration and distribution of certificates and configuration profiles to iOS devices.
For more advanced distribution methods refer to Apple's enterprise documentation found here.
Here's the table of contents of the attached document "iOS_Certificate-based-authentication.pdf":
iOS Devices (iDevices)
iPhone Configuration Utility
Authenticating iOS devices on ProxySG
Certificates on iOS devices
Install CA certificate
Create a separate CA certificate list
Install SSL Server Keyring
Create HTTPS-Reverse-Proxy service
Create Certificate Authentication Realm
Create a policy to authenticate iOS devices
iOS device configuration
Create client certificate
Create configuration profile (optional – skip if installing certificates directly)
Distribute certificates/configuration profile
Install certificates / configuration profile
Access web resources through ProxySG
Verify iOS device are authenticated
The second document ("UC-ios_transparent_authentication-v1.0.pdf") describes the same topic from a different point of view. It is a 1-pager and describes the use case of authenticating iOS devices.
The 1-pager contains enough information for very experienced ProxySG administrators. Most people probably would have to use the more detailed one.