Amer Networks E5Web GUI - Manual (Page 333)

Figure 4.23. Multicast Proxy Mode
In Snoop Mode, the Clavister Security Gateway will act transparently between the hosts and
another IGMP router. It will not send any IGMP Queries. It will only forward queries and reports
between the other router and the hosts.
In Proxy Mode, the security gateway will act as an IGMP router towards the clients and actively
send queries. Towards the upstream router, the security gateway will be acting as a normal host,
subscribing to multicast groups on behalf of its clients.
4.7.3.1. IGMP Rules Configuration - No Address Translation
This example describes the IGMP rules needed for configuring IGMP according to the No Address
Translation scenario described above. The router is required to act as a host towards the
upstream router and therefore IGMP must be configured to run in proxy mode.
Example 4.17. IGMP - No Address Translation
The following example requires a configured interface group IfGrpClients including interfaces if1,
if2 and if3. The IP address of the upstream IGMP router is known as UpstreamRouterIP.
Two rules are needed. The first one is a report rule that allows the clients behind interfaces if1, if2
and if3 to subscribe for the multicast groups 239.192.10.0/24. The second rule, is a query rule that
allows the upstream router to query us for the multicast groups that the clients have requested.
The following steps need to be executed to create the two rules.
InControl
Follow the same steps used for the Web Interface below.
Web Interface
A. Create the first IGMP Rule:
Chapter 4: Routing
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