Opening a port for NTP

Greg Tomilson · Post by **Greg Tomilson** » Mon Nov 10, 2003 11:19 pm

Can anyone give me the steps to setting up my Lynksys Etherfast router (BEFSR81) so that I can have my Win2k domain controller get the time off the internet via NTP?

Stu · Post by **Stu** » Thu Nov 13, 2003 1:54 am

If you are just getting the time from a stratum server, then you don't need to set up anything on the router. If, on the other hand, you want to act as a server (so that others can get the time from your machine--in effect become a stratum 2 server), then you need to port forward both tcp and udp for port 123 (ntp).

woahbinger · Post by **woahbinger** » Tue Nov 18, 2003 9:24 am

You'll want to go to the port forwarding section and open port 123/udp and set the destination address to the interal IP of your DC. Then you'll have to run these four commands on the DC:

net time /setsntp:<I>synchronization server IP or DNS</I>
net stop w32time
w32tm –once
net start w32time

Then, on your workstations/laptops run the last three commands so that they can synch with your DC. That should be all.

Post by **YeOldeStonecat** » Fri Nov 21, 2003 7:39 am

What is your goal, to have your server manage the time for all clients that are on the local LAN? If so, then you don't need to open/forward any ports on your router.