Matt Wagner wrote: > - I'm setting up a new server on the East Coast (US). I'm trying to find > some NTP servers that are close (latency-wise), but many of them block > ping. Short of adding them to my ntp.conf and restarting, is there a way > to test their response time?
Using ntpdate -q will provide you with what you need. You may need to install ntpdate since it is deprecated due to Cron abuses. ntptrace is useful too, however, if a server doesn't respond to query calls it won't respond to ntptrace while it will respond to time calls (and therefore ntpdate). > - A related question: is there a way to modify my server list while the > server's running? Halting ntpd, editing the ntpd.conf, and then > restarting ntpd is problematic, especially when it takes several minutes > for it to get a "fix" upon restarting. There is, but it requires setting up authentication. I know that a few on this list have set authentication up, but I've never been able to find instructions good enough on how to do it to muddle through getting it set up on my system. If someone has a good detailed howto, we should probably put this on the pool site somewhere. > - When I set up my server in Texas, there were ample stratum 1 servers > with open access policies, allowing me to become a stratum 2 without > problems. However, it seems that there are fewer open stratum 1s on the > East Coast... Is running a server in the pool considered a good reason > to request permission, or should I just stay at stratum 3? Stratum is irrelevant. And there is nothing wrong with finding pool servers near you to use in your config. Just don't use pool.ntp.org because you don't know where in the world the server will be and likely isn't close. dig north-america.pool.ntp.org +short will give you a list to start with. ntpdate -q to find out how far away it is. In Philadelphia I had no issue finding 10 servers (public and pool) within 30ms delay. In Fort Lauderdale, I'm lucking to find 10 servers within 60ms delay. Other parts of the world I wouldn't be surprised if 100-150+ was the closest you can get. As they say, YMMV. _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
