IGMP Proxy

The Internet Group Management Protocol (IGMP) Proxy provides a means to proxy multicast traffic between network segments.

The IGMP Proxy service can be found at Services > IGMP Proxy.

IGMP Proxy Settings

The IGMP Proxy service has the following settings:

Interface:

The interface to be used for this instance

Description:

Optional text to describe this instance

Type:

The type of network interface defined by this instance

Upstream Interface:

The outgoing interface which is responsible for communicating to available multicast data sources. There can only be one upstream interface.

Downstream Interface:

The distribution interfaces to the destination networks, where multicast clients can join groups and receive multicast data. One or more downstream interfaces must be configured.

Note

For a working IGMP Proxy configuration, one upstream and at least one downstream interface must be defined.

Threshold:

The TTL threshold for forwarded data on an interface, to prevent looping from occurring. Packets with a TTL lower than the value in this field will be ignored. The default TTL is 1 if the field is left blank.

Networks:

A list of CIDR-masked Network entries to control what subnets are allowed to have their multicast data proxied. Click fa-plus Add Network to enter additional networks.

IGMP Proxy Configuration

To configure the IGMP Proxy:

  • Navigate to Services > IGMP Proxy

  • Click fa-plus Add to create a new interface instance

  • Configure the instance

  • Click Save

IGMP requires a firewall rule on the Downstream side (e.g. LAN) to pass its multicast traffic. In the Advanced Options of the firewall rule, Allow packets with IP Options must be enabled.