@Override
        public String getName() { return "ssl-auth-max-domain-validity"; }
The property representing the amount of time that the temporary, unique
subdomain generated for SSL/TLS authentication may remain valid, in
minutes. This subdomain is used to ensure each SSL/TLS authentication
attempt is fresh and does not potentially reuse a previous
authentication attempt that was cached by the browser or OS. This
interval must be long enough to allow for network delays in
authenticating the user with the SSL termination service that enforces
SSL/TLS client authentication, but short enough that an unused domain
does not consume unnecessary server resources and cannot potentially be
guessed while that subdomain is still valid. These subdomains are
128-bit secure random values.
extensions/guacamole-auth-sso/modules/guacamole-auth-sso-ssl/src/main/java/org/apache/guacamole/auth/ssl/conf/ConfigurationService.java