Re: [TCLUG:6940] Help needed to set up an NTP server

[Ben Luey <lueyb@carleton.edu>]

ntp defaults to use udp on port 123. I added the below line to my
firewall to allow ntpdate to work. If you can get the admin of the
firewall you allow the ip of the linux box receive  udp on more 123 that
would be the easiest. Otherwise, maybe you can get the firewall computer
to do a time sync and you can sync with it.

/sbin/ipchains -A input -p udp -j ACCEPT -d $YOURIP  123


Good Luck,

Ben


Bob Tanner wrote:
> 
> Quoting Mike Glaser (jurupari@geocities.com):
> > I am trying to set up a time server on a linux PC and I am not having
> > any luck getting it to run.
> 
> Does your firewall have a NTP proxy? If you are using a generic UDP proxy,
> then you will have problems. Since most (all?) firewalls without NTP proxies
> do not allow transparent UDP packets, you are out of luck.
> 
> Normally, what you do is point your linux box to the firewall, the firewall to
> a stratus 1 server and all works fine. The firewall syncs with the status 1
> servers and your private network syncs with your firewall.
> 
> --
> Bob Tanner <tanner@real-time.com>       | Phone : (612)943-8700
> http://www.real-time.com                | Fax   : (612)943-8500
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-- 
Ben Luey
lueyb@carleton.edu
ICQ: 19144397