Tenda D840 User Manual page 49

4) Click "Next".
a. Enable NAT:
NAT enables multiple
computers in your LAN
to use the same WAN IP
address for Internet
access. It is
recommended to check
this option.
b. Enable Firewall
It is recommended to
check this option to
avoid some attacks.
c. Enable IGMP Multicast:
IGMP agent. For
example, to enable the
IPTV in the PPPoE mode,
you need to check this
option.
d. Enable WAN Service:
Checked by default. It is
recommended to keep
this default
setting,unless you do
not need to activate your
D840R ADSL2+ Router User Guide
44