Multicasting; Network Objects; Figure 13-28: Routing Rule Settings - AudioCodes MP-202 User Manual

13.16.2 Multicasting

The MP-202 provides support for IGMP multicasting, which allows hosts connected to a
network to be updated whenever an important change occurs in the network. A multicast is
simply a message that is sent simultaneously to a pre-defined group of recipients. When
you join a multicast group you will receive all messages addressed to the group, much like
what happens when an e-mail message is sent to a mailing list.
IGMP multicasting enables UPnP capabilities over wireless networks and may also be
useful when connected to the Internet through a router. When an application running on a
computer in the home network sends out a request to join a multicast group the MP-202
intercepts and processes the request. If the MP-202 is set to 'Minimum Security' no further
action is required. However, if the MP-202 is set to 'Typical Security' or 'Maximum Security'
you must add the group's IP address to the MP-202's 'Multicast Groups' screen. This will
allow incoming messages addressed to the group to pass through the Firewall and on to
the correct LAN computer.
1. Click the 'Routing' icon in the 'Advanced' screen.
2. Select the 'Multicast Groups Management' check-box.
3. Press the 'OK' button.

13.17 Network Objects

Network Objects is a method used to abstractly define a set of LAN hosts, according to one
or more MAC address, IP address, and host name. Defining such a group can assist when
configuring system rules. For example, network objects can be used when configuring the
gateway's security filtering settings such as IP address filtering, host name filtering or MAC
address filtering.
You can use network objects in order to apply security rules based on host names instead
of IP addresses. This may be useful, since IP addresses change from time to time.
Moreover, it is possible to define network objects according to MAC addresses, making
rule application more persistent against network configuration settings.
MP-202 Telephone Adapter

Figure 13-28: Routing Rule Settings

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User's Manual
Document #: LTRT-50605