https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Aug2014/CVD-GETVPNDesignGuide-AUG14.pdf

On a FlexVPN hub-and-spoke topology where spoke-to-spoke tunnels are not allowed, the command that is needed for the hub to be able to terminate FlexVPN tunnels is interface virtual-template. The interface virtual-template command is used to configure a virtual template interface which provides a secure tunnel for FlexVPN connections. The other commands listed - interface virtual-access, ip nhrp redirect, and interface tunnel - are not related to FlexVPN and are not used to terminate FlexVPN tunnels.

https://www.cisco.com/c/en/us/td/docs/security/asa/asa94/config-guides/asdm74/vpn/asdm-74-vpn-config/webvpn-troubleshooting.html The following Clientless SSL VPN features will not work when the http-only-cookie command is enabled:
* Java plug-ins
* Java rewriter
* Port forwarding
* File browser
* Sharepoint features that require desktop applications (for example, MS Office applications)
* AnyConnect Web launch
* Citrix Receiver, XenDesktop, and Xenon
* Other non-browser-based and browser plugin-based applications

Trusted Network Detection (TND) gives you the ability to have AnyConnect automatically disconnect a VPN connection when the user is inside the corporate network (the trusted network) and start the VPN connection when the user is outside the corporate network (the untrusted network). https://www.cisco.com/c/en/us/td/docs/security/vpn_client/anyconnect/anyconnect41/administration/guide/b_AnyConnect_Administrator_Guide_4-1/configure-vpn.html#id_100236

In GETVPN, all group members share a common security association (SA) database and the same keys for encryption and decryption. This approach avoids the need for per-peer IPsec SAs and simplifies the configuration and management of the VPN. Instead of using multiple SAs, GETVPN uses a single SA with a unique Group Domain of Interpretation (GDOI) group key that is distributed to all group members.