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Chapter 7: WAN Service Discovery
724-746-5500 | blackbox.com 7-1
This chapter discusses special issues that might be related to configuring the Auto-
Sync Time Clock for Wide Area Network (WAN) service discovery.
7. Wide Area Service Discovery
“Wide Area Service Discovery” is the expansion of mDNS protocol, which allows the
devices to register their services in the companywide DNS server so they can be
discovered across the subnets. The Auto-Sync Time Clock comes with a built-in
feature of “Wide Area Service Discovery” so the clocks connected to one network
can be remotely discovered and managed from a PC connected to another network
(see Figure 7-1).
Figure 7-1. WAN Service Discovery.
7.1. Wide Area Service Discovery Setup
The default factory setting on the Auto-Sync Time Clock is “Local Area Service
Discovery” so that clocks on network1 can only be discovered and managed from
the PC connected to network1.
To configure the clock for Wide Area Service Discovery:
1. Setup your DNS server to update non-secure dynamic updates. Make sure the
firewall is not blocking UDP port 53 on the DNS server.
2. Click on the DNS Servers link under Time Sync
, and the DNS Servers
Settings screen will appear displaying the four (4) default public DNS servers
(see Figure 7-2).