Bonjour Reflector for Network Segmentation
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 now 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.
Rate Limit (per second)
- Select orAddan L3 ethernet or subinterface or AE interface.If you add a subinterface, it must use aTagother than 0.
- SelectIPv4then select theEnable Bonjour Reflectoroption.
- Repeat steps 1—4 for all L3 or AE interfaces and subinterfaces where you want to forward Bonjour traffic.You can enable this option on up to 16 different interfaces or subinterfaces.
- Commityour changes.
- Confirm that theFeaturescolumn for the interface or interfaces where you enable the Bonjour Reflector option displaysBonjour Reflector:yes( ).
- Use theshow bonjour interfaceCLI command to display all interfaces where the firewall forwards Bonjour traffic and a list of counters.rxrepresents the total number of Bonjour packets the interface receives,txrepresents the total number of Bonjour packets the interface transmits, anddroprepresents the number of packets the interface drops.admin> show bonjour interface name rx tx drop ---------------------------------------------------------- ethernet1/4 1 1 0 ethernet1/7 0 0 0 ethernet1/7.10 0 0 0 ethernet1/7.20 4 4 0 ae15 0 0 0 ae16 0 0 0 ae16.30 0 2 0 ae16.40 0 0 0
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