Re: W32time and opening port NDP port 123
From: Dave Stoecker (david_stoecker_at_hotCOFFEEmail.com)
Date: 02/26/04
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Date: Wed, 25 Feb 2004 23:14:23 -0600
I get these log entries every 2 or 3 days, but I'm fairly certain the sync
is happening most of the time. My packet filter is same as IBC suggests...
Try a manual sync:
Stop the windows time service, open a command prompt, type "w32tm -once" (no
quotes) and see if it connects...
I check this whenever I seem to be getting too many of the log errors - as a
matter of fact I just had one 2 hours ago. I did the manual sync and my
system connected and was only 57ms off...
Probably flaky network conditions or the time server is too busy (?) Also,
I use IP addresses rather than DNS names, seem to have better luck that way.
Hth - DS
"Fred Blum" <h.f.blum@marketconnectnospam.nl> wrote in message
news:elW%23jl7%23DHA.4060@TK2MSFTNGP10.phx.gbl...
>
>
> I've changed my packet filter from Local Port fiexed 123 to all ports. My
> filter settings where for the rest the same.
> Still Shields Up!http://grc.com/x/ne.dll?rh1dkyd2 reports the port as
> closed.
>
> ----------------------------------------------------------------------
>
> GRC Port Authority Report created on UTC: 2004-02-25 at 15:56:02
>
> Results from probe of port: 123
>
> 0 Ports Open
> 1 Ports Closed
> 0 Ports Stealth
> ---------------------
> 1 Ports Tested
>
> THE PORT tested was found to be: CLOSED.
>
> TruStealth: FAILED - NOT all tested ports were STEALTH,
> - NO unsolicited packets were received,
> - A PING REPLY (ICMP Echo) WAS RECEIVED.
>
> ----------------------------------------------------------------------The
> event log has the follwing error: The NTP server didn't respond. I've set
> the authorative time server to time.microsoft.com as according to KB
216734
> this machine is available. Should I try another one?0Or is this port
indeed
> closed? Howto override this in ISA? Regards,Fred
>
>
>
>
>
> "IBC" <spamityspam@spam.spam> wrote in message
> news:eDrlEG7%23DHA.2636@TK2MSFTNGP09.phx.gbl...
> > I added this filter:
> >
> > Go to ISA\Access Policy\IP Packet Filters
> > Right click IP Packet Filters and select New\Filter
> > Give the Filter a name (like Time Server or whatnot)
> > Select Allow Packet transmission
> > Select Custom
> > IP Protocol is UDP
> > Direction is Send/receive
> > Local port is All ports
> > Remote port is Fixed Port
> > Port Number is 123
> > Filter applies to the default addresses on the external interface
> > Filter applies to all computers.
> >
> > Give that a whirl.
> >
> >
> > "Fred Blum" <h.f.blum@marketconnectnospam.nl> wrote in message
> > news:eGIeAe6#DHA.4060@TK2MSFTNGP10.phx.gbl...
> > >
> > > I have had a problem with two domain controllers in our network no
> longer
> > > replicating as the time difference between the two became more then
than
> 5
> > > minutes.
> > >
> > > On the operations master (also acting as the PDC) i want to setup
W32tim
> e
> > to
> > > use an external time server (time.micorosoft.com). W32time logs NTP
> server
> > > not responding and ShieldsUp! reports 123 as being closed on our
> network.
> > So
> > > I guess the port 123 is blocked by our ISA server. How can I open this
> > port
> > > to send receive?
> > >
> > > TIA,
> > >
> > > Fred Blum
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
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