Take the 2-minute tour ×  I want my Windows 7 machine to get its
time from my Linux Debian Sid server.  So I want ahead and
installed OpenNTPD from the Debian repository. It doesn't listen
to anything by default, so I configured it as follows:  listen
on server 0.debian.pool.ntp.org server 1.debian.pool.ntp.org
server 2.debian.pool.ntp.org server 3.debian.pool.ntp.org being
my server's IP address on my LAN. I entered it in the Windows
settings and I got this:  enter image description here  I used a
network sniffer (Wireshark) to check if this was a network
issue. It's not: Windows is happily sending NTP packets and
receives responses from my server. I guess Windows is not
pleased by the answer it gets from the server. Thing is, I have
no idea why…  Here's the result of w32tm /query /verbose /peers
on the Windows machine:  #Peers: 1  State: Active Time
Remaining: 604046.2718893s Mode: 3 (Client) Stratum: 0
(unspecified) PeerPoll Interval: 0 (unspecified) HostPoll
Interval: 10 (1024s) Last Successful Sync Time: