D-Link DWR-961 User Manual page 7

Section 4 - Configuration
Reconnect This feature enables this product to renew the WAN IP address
Mode: automatically when the lease time has expired.
Enabling this option will disable the NAT firewall function of the
NAT disable: DWR-9 , exposing all connected devices directly to the Internet.
This is an advanced feature and not recommended for normal use.
Click Apply to save your settings, or Refresh to revert to your
previous settings.
D-Link DWR-9 User Manual 9