NetDefendOS supports two IGMP modes of operation:
• Snoop Mode
• Proxy Mode
The operation of these two modes are shown in the following illustrations:
Figure 4.16. Multicast Snoop Mode
Figure 4.17. Multicast Proxy Mode
In Snoop Mode, the NetDefend Firewall 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.
4.6.3. IGMP Configuration Chapter 4. Routing
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