Whenever you apply new settings onDFL-200/700/1100, two new buttons show up to your left:

Activate or Discard. Press Activate tocontinue.

Now you can choose how long the firewall will wait for you tologin.

Then press Activate Changes.

Note: If you change the management IP, then activate, youhave the time limit to set a machine to the new IP range, thenlogin.

If you don't login within the time limit set, your firewallwill revert to the previous setup.