Turn Magento 2 Maintenance Mode ON or OFF?

To Turn Magento 2 Maintenance Mode ON

bin/magento maintenance:enable

To Turn Magento 2 Maintenance Mode OFF

bin/magento maintenance:disable

 If you need to whitelist your IPs

bin/magento maintenance:enable –ip=X1.X1.X1.X1 –ip=X2.X2.X2.X2

To enable maintenance mode for all clients except 192.0.2.10 and 192.0.2.11:

bin/magento maintenance:enable –ip=192.0.2.10 –ip=192.0.2.11