CSSv5.0.0 en:Security Modes Default Preset
This section allows setting the default preset of which security modes are active, and which is the default. Newly created Policy Rules will be initialized with the values defined on this page. If a security mode is active, it will be available to be chosen as security mode when sending a transfer. If only a single security mode is active, only this security mode may be used when sending a transfer.
Security Mode QUICK - Default only if established
If this checkbox is active, the security mode 'QUICK' will be treated as default security mode, but only if an established QUICK connection between sender and recipients already exists. If this is not the case, the security mode set as default is used.