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.

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

To configure the IGMP Proxy:

  • Navigate to Services > IGMP Proxy

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

  • Configure the instance as follows:

    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.

    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.

    • Click Save

A firewall rule is also required on the Downstream side (e.g. LAN) to match and pass the multicast traffic. In the Advanced Options of the firewall rule, Allow packets with IP Options must be enabled.