Re: Windows Time with NTPv4

On Mar 13, 3:56 am, Martin Burnicki <martin.burni...@xxxxxxxxxxx>
wrote:
The default was that ntpd just dropped those requests, i.e. didn't send a
response at all, in which case the w32time clients were unable to
synchronize to the NTP server, unless they were reconfigured correctly to
send "client" requests.

Hmm... I've notice lots of Windows machines that connect to my pool
server, which runs ntpd 4.2.4p4@xxxxxxxxxxxx (Meinberg). Wireshark
indicates that the ntp srever does reply with Symmetric Active packets
to thse Windows clients (mode 1), even though no peers or
authentication are configured. I even have a "restrict default nopeer"
in there.

(I say "Windows clients" as I am guessing anything that is NTPv3,
clock precision of -6, and requests symmetric active is a Windows
client.)

I've also never had any trouble syncing to any pool.ntp.org servers
using w32time, even without the 0x8 client mode identifier.

My pool ntp.conf:
# Use specific NTP servers
server ntpmaster1.sys.cogentco.com iburst
server ntpmaster2.sys.cogentco.com
server ntp-2.cso.uiuc.edu
server ntp3.cs.wisc.edu

#Local network Peers
peer ntp1.bai.org
peer ntp2.bai.org

restrict default kod nomodify notrap nopeer
restrict <localsubnet> mask 255.255.252.0 nomodify notrap
restrict <localsubnet> mask 255.255.250.0 nomodify notrap
restrict 127.0.0.1

.

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