Adding servers to the China zone

Hi Chris,

this is currently not possible.

ps: shall we add the DE Zone to that server?

@apuls : yes please. Austria as well if possible.
I hope it will be better than with china… :frowning:

Thank you for participating

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Could you also add belgium to my NTP server ?

Thanks in advance.


Server added to BE

Thanks very much.

Hello, could you add the following countries to my server ?

  • Andorra;
  • Monaco;
  • Liechtenstein;
  • Luxembourg;
  • Holy See (Vatican City State).

Thanks in advance.


Hi Chris, have just added ad, mc, li, lu and va as requested

@elljay : thanks.


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Hello, could you add the following countries to my server ?

  • Spain.

Thanks in advance.


Hi Chris, 'tis done. Are you trying to get the record for as many countries as possible on one server? :smiley:

Hello Elljay,

Thanks for adding Spain.
No i’m just trying to help countries with very few (or none) NTP servers…as long as my ISP box works.
Because it is the weakest part of my network.

Do you know a good and cheap router that can accept 15000 new connections / second ?

Hello, my router went down many times yesterday. could you remove my ntp server from es (spain) zone ? thx in advance. Chris

Hi Chris, 'tis done.

Not sure if you need it for some reason, but usually it’s best to disable connection tracking for the NTP port completely. No memory wasted on NTP clients.

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@elljay :thanks very much.

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@ mlichvar : thanks. I didn’t even thought about this solution…um, i feel sorry.

I havent tried it myself, but I was ones told to disable it in both directions.

A few months since my last post, is serving many more replies than it had usually been, now at about 25kqps (more than a million a minute) oppose to 15kqps, at the 1000MiBit setting. Things are holding strong but please don’t consider this thread as closed post or ‘done deal’. The China zone still needs help, especially with servers on its continent.

root@montreal:~# uname -a
Linux 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u5 (2019-08-11) x86_64 GNU/Linux
root@montreal:~# while true; do (sleep 1; pkill -INT tcpdump) & disown; var=(tcpdump -n port 123 2>&1 >/dev/null); echo -en "(date): "; grep captured <<< “$var”; done 2>/dev/null | tee -a log.txt
Tue Sep 24 00:59:05 EDT 2019: 51026 packets captured
Tue Sep 24 00:59:06 EDT 2019: 46002 packets captured
Tue Sep 24 00:59:07 EDT 2019: 52987 packets captured
Tue Sep 24 00:59:09 EDT 2019: 49534 packets captured
Tue Sep 24 00:59:10 EDT 2019: 44833 packets captured

The server is now running Debian 9 with SELinux enabled.

Thanks and kind regards.


I added 3 more servers to CN/IN zone. I am serving about ~20kqps at 1000 MiBit setting. Hope that took some load off of your servers.