Public Time Server
A Time Server is a device connected to a network that has trusted time and responds to a computer
request for time information by using one of several internet time protocols. By far the most
commonly used time protocol is the Network Time Protocol (NTP). Other time protocols include
the Simple Network Time Protocol (SNTP), Time and Daytime.
A Public Time Server is a Time Server connected to the Internet that is
available for public use and it responds to time queries from computers all over the world.
By installing the NTP client software on your workstations, then directing them to get
their time from the Public Time Server, you can keep the clocks on your network synchronized
via the Internet.
This is fine as far as it goes but many IT Administrators want a dedicated time server installed
inside their firewall. Why? There are several reasons but the main one is security.
Using a Public Time Server means you have to open a "hole" in your firewall (UDP 123).
This brings with it a risk of attack from the outside. With a time server inside your firewall
you have control over all aspects of synchronizing your network and you can keep your firewall as intact
There are many Public Time Servers available around the world.
For a comprehensive list go to ntp.isc.org.
At EndRun Technologies we specialize in the manufacturing of very high-quality
Network Time Servers.
If you are an IT Administrator interested in maintaining a high level of security on your network
then click here for more information.