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Operating Systems Linux What is the best OS for NTP server? Post 302984463 by rbatte1 on Wednesday 26th of October 2016 08:47:51 AM
Old 10-26-2016
It depends on what central servers you have that are used for general services such as DNS, LDAP, etc. Often these are Windows, but not always.

You can also buy dedicated devices that listen to a radio signal and provide them as a local service or listen to clock sites on the internet. Like RudiC says, the OS is not really important and indeed once you have a reliable time source most NTP clients are servers by default, so you can actually build layers in depending on your geographic structure, for example:-
  • In your main data centre, you define a couple (two or three) servers to listen to multiple internet provided clocks in addition to their normal roles. These are your first tier.
  • You have 4-6 servers that listen to your first tier and act as your second tier, in addition to their normal roles.
  • Other servers on-site all listen to a selection of the second tier servers
  • Remote sites need 2-3 servers that listen to the second tier servers in addition to their normal role. These are your third tier.
  • Other servers in remote sites all listen to the third tier servers.
This is not prescriptive, but should minimise traffic whilst giving resilience. The servers chosen to provide the service should have an existing role. There is little point in incurring the costs (physical/logical/licences/effort/patching etc.) just to run a dedicated time server.

If you have hundreds of client machines at a site, you should consider increasing the number of time-servers as appropriate to ensure they are not overloaded. Not every client needs to watch every time server, probably 3 would be sensible.



Just my thoughts, but I hope that this helps,
Robin
 

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KA-FORWARDER(8) 					       AFS Command Reference						   KA-FORWARDER(8)

NAME
ka-forwarder - Forward AFS Authentication Server requests to another server SYNOPSIS
ka-forwarder [-p <port>] <server>[/<port>] [...] DESCRIPTION
ka-forwarder listens for requests for an AFS Authentication Server and forwards them to a remove fakeka server. fakeka is a server that answers AFS Authentication Server protocol requests using a regular Kerberos KDC and is provided with some Kerberos 5 implementations. fakeka has to run on the same host as the Kerberos KDC, however, and AFS clients send all native AFS authentication requests to the AFS database servers. If you don't want to run your Kerberos KDCs and your AFS database servers on the same host, run ka-forwarder on the AFS database servers and point it to fakeka running on the Kerberos KDCs. ka-forwarder takes one or more servers to which to forward the requests. The default port on the remote server to which to forward the command is 7004, but a different port can be specified by following the server name with a slash ("/") and the port number. If multiple servers are given, ka-forwarder will send queries to each server in turn in a round-robin fashion. CAUTIONS
Due to the way that ka-forwarder distinguishes from client requests and server responses, any messages from one of the servers to which ka- forwarder is forwarding will be considered a reply rather than a command and will not be forwarded. This means that the servers running fakeka will not be able to use native AFS authentication requests and rely on ka-forwarder to send the requests to the right server. ka-forwarder does not background itself. It should either be run in the background via the shell, or run via the Basic OverSeer Server (see bosserver(8)). OPTIONS
-p <port> By default, ka-forwarder listens to the standard AFS Authentication Server port (7004). To listen to a different port, specify it with the -p option. EXAMPLES
Forward AFS Authentication Server requests to the fakeka servers on kdc1.example.com and kdc2.example.com: % ka-forwarder kdc1.example.com kdc2.example.com & Note the "&" to tell the shell to run this command in the background. PRIVILEGE REQUIRED
ka-forwarder only has to listen to port 7004 and therefore does not require any special privileges unless a privileged port is specified with the -p option. SEE ALSO
bosserver(8), fakeka(8), kaserver(8) COPYRIGHT
Copyright 2006 Russ Allbery <rra@stanford.edu> This documentation is covered by the IBM Public License Version 1.0. This man page was written by Russ Allbery for OpenAFS. OpenAFS 2012-03-26 KA-FORWARDER(8)
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