Apple Bonjour (also known as zero-configuration
networking) enables automatic discovery of devices and services
on a local network. For example, Bonjour allows you to connect to
a printer without manually configuring the printer’s IP address.
To translate names to addresses on a local network, Bonjour uses
Multicast DNS (mDNS). Bonjour uses a private multicast range for
its traffic, which does not allow traffic routing, preventing use
in an environment that uses network segmentation for security or
administrative purposes (for example, where servers and clients
are in different subnets).
To support Apple Bonjour in network
environments that use segmentation to route traffic, you can forward
Bonjour IPv4 traffic between
Layer 3 (L3)
Ethernet or
Aggregated Ethernet (AE) interfaces
or subinterfaces that you specify. The Bonjour Reflector option
allows you to forward multicast Bonjour advertisements and queries
to L3 Ethernet and AE interfaces or subinterfaces, ensuring user
access to services and device discoverability regardless of Time
To Live (TTL) values or hop limitations.
Bonjour traffic
forwarding is supported for the PA-220, PA-800, and PA-3200 series.
When
you enable this option, the firewall redirects Bonjour traffic to
the L3 and AE interfaces and subinterfaces where you enable this
option. You must enable this option on all supported interfaces
that you want to manage Bonjour traffic; for example, if you want
a specific L3 interface to forward Bonjour traffic to an AE interface,
you must enable this option on both interfaces. You can enable this
option on up to 16 interfaces.
To prevent loops, the firewall
modifies the source MAC address to the firewall’s egress interface
MAC address. To help prevent flooding attacks, if the firewall receives
more than the number of packets per second specified in the following
table, the firewall drops the packets to protect the firewall and
the network.
Series | Rate Limit (per second) |
PA-220 | 100 |
PA-800 | 200 |
PA-3200 | 500 |