Internet Direct (Indy) Version 9.0.2 Beta
TIdAuthentication.KeepAlive
Indicates that Keep-Alive signals are supported for the authentication mechanism.

function KeepAlive: Boolean; virtual; abstract;
Description
KeepAlive is an abstract virtual Boolean function that specifies the function used to indicate if the authentication mechanism supports use of the KEEP-ALIVE header. Descendant classes, like TIdBasicAuthentication, must implement the KeepAlive function to indicate if the mechanism can be used to prevent loss of a connection during authentication processing.