Bob wrote: > How exactly do you configure NTP to send a KOD? I'm running Meinberg's port > under Win XP. I'm a sever in the pool. I've got two remote clients that are > querying at a rate of several times a minute. Sometimes their queries are > spaced wider, but sometimes they hit me spaced at only a few seconds apart. > I can block them in my router, but they'd still be sending traffic my way. > I'd like to see if KOD makes them go away. Reading the docs, it appears > that I need to mod ntp.conf and add restrict x.x.x.x kod, but then I'd need > to restart the service. > > Thanks for any help.
Let me give you the bad news: If they are hitting your server that frequently then they are most probably not running ntpd and only ntpd as far as I know, takes notice of KOD packets. There is a newer version in ntp-dev which will in a KOD basically return the same timestamp that was sent and if the client is obeying the rules it will cause the client which is ignoring the KOD signal to misinterpret and reset the clock to be further away from the existing time on your ntpd server so that each time it tries it gets further and further away in ever increasing amounts. When the clock is so far off that someone notices they will probably stop using your servers. Meinberg has not released a copy of that version since it's still development code. Maybe we can make you a binary which you could just drop into the directory where you keep ntpd.exe. We will then see if that works for you. I would make an excellent test. I assume you do not know whose machines belong to? Danny _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
