D820R ADSL2+ Router User Guide
screen will appear.Please enter
the “
Start IP Address
”, “
End IP
Address
” and “
Netmask
”, click
“
Submit
” to save the configuration.
Note: the start IP can not be
vertical with the end IP
address.The other fields can
leave blank.
4.2 System Service
You can configure the following
items: NAT, RIP, Firewall, IP Filter,
Bridge Filter, DNS, Blocked
Protocol, DDNS, UPnP, and
SNTP.
4.2.1 NAT
NAT allows a signal device to
act as an intermediary between
the Internal and a local network,
which usually assigns a public
address to a PC (or group of
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