PROLiNK
®
H5004N User Manual 
www.prolink2u.com 
Version 1.00 (Jan’10) 
35 
Fields in this page: 
Field 
Description 
Domain Blocking capability 
Check this item to enable the Domain Blocking feature. 
Domain 
The blocked domain. If the URL of Taiwan Yahoo web site is 
tw.yahoo.com, the domain can be yahoo.com. 
Function buttons in this page: 
Apply Changes 
Click to disable/enable the Domain Block capability 
Add Domain 
Add domain into Domain Block table. 
Delete Selected Domain 
Delete the selected domain from the Domain Block table. You can click the 
checkbox at the Select column to select the Blocked domain. 
4.4.6 
IGMP Proxy Configuration 
Multicasting is useful when the same data needs to be sent to more than one hosts. Using 
multicasting as opposed to sending the same data to the individual hosts uses less 
network bandwidth. The multicast feature also enables you to receive multicast video 
stream from multicast servers. 
IP hosts use Internet Group Management Protocol (IGMP) to report their multicast group 
memberships to neighboring routers. Similarly, multicast routers use IGMP to discover 
which of their hosts belong to multicast groups. This device supports IGMP proxy that 
handles IGMP messages. When enabled, this device acts as a proxy for a LAN host 
making requests to join and leave multicast groups, or a multicast router sending multicast 
packets to multicast group on the WAN side. 
When a host wishes to join a multicast group, it sends IGMP REPORT message to the 
device’s IGMP downstream interface. The proxy sets up a multicast route for the interface 
and host requesting the video content. It then forwards the Join to the upstream multicast 
router. The multicast IP traffic will then be forwarded to the requesting host. On a leave, 
the proxy removes the route and then forwards the leave to the upstream multicast router. 
 19216811.live
19216811.live