D-Link DSL-225 User Manual page 36

In this section we can configure the Local Area Network (LAN) parameters.
IP Address: Enter the local IP address for this router here. This IP address
is also used to connect to this device's Web User Interface. Please
note that after changing this IP address you'll be forced to log into the
Web User Interface again, using the new IP address.
Subnet Mask: Enter the subnet mask used here.
Enable IGMP Snooping: Select this option to enable the IGMP snooping
option.
Standard Mode: Select this option to enable the IGMP Snooping standard
mode.
Blocking Mode: Select this option to enable the IGMP Snooping blocking
mode.
Enable LAN side firewall: Click the checkbox to enable this option.
Web User Interface Configuration
D-Link DSL-225 11N VDSL2 Router User Manual
Page 36