User manual

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requests from the same internal IP address and port are mapped to the same
external IP address and port. An external host can send a packet to the internal host,
by sending a packet to the mapped external address.
ENABLE FIREWALL
To enable IP packet filtering, tick this checkbox . The Advanced Setup  Security
 IP Filtering option will appear on the main menu after reboot. Disable this function
when not required for improved performance.
ENABLE IGMP MULTICAST
Tick the checkbox  to enable Internet Group Membership Protocol (IGMP)
multicast. IGMP is a protocol used by IP hosts to report their multicast group
memberships to any neighboring multicast routers.
ENABLE WAN SERVICE
Tick the checkbox  to enable WAN service.
SERVICE NAME
This is the WAN Service label.
STEP 6: The Device Setup screen is used to configure LAN interface settings.
The IP address and Subnet Mask define the location of the CT-5072T on the LAN.
To auto-assign IP addresses, DNS server and default gateway to other LAN devices,
select the Enable DHCP server radio button. You must also enter the start and
end IP address, Subnet Mask and DHCP leased time.