Below are described some basic cases for ntp.conf on ntp-client: a) In the simplest case of ntp-client the following ntp.conf is defined:
restrict default noquery nomodify notrap restrict 127.0.0.1 driftfile /var/lib/ntp/ntp.drift server xx.xx.xx.xx minpoll 4 maxpoll 4 restrict xx.xx.xx.xx Why should i need the restrict line xx.xx.xx.xx? What does the first restrict line means? b1)In case using 2 ntp-servers from which my ntp-client can get time, is my ntp-client taking time from xx.xx.xx.xx and if this server is not reachable then from xx.xx.xx.yy? restrict default noquery nomodify notrap restrict 127.0.0.1 driftfile /var/lib/ntp/ntp.drift server xx.xx.xx.xx minpoll 4 maxpoll 4 server xx.xx.xx.yy minpoll 4 maxpoll 4 restrict xx.xx.xx.xx restrict xx.xx.xx.yy What happens if xx.xx.xx.xx comes up again? Does client take time again from the xx.xx.xx.xx? b2) What does prefer do in this case b2)? Is there any difference between b1) and b2) case? restrict default noquery nomodify notrap restrict 127.0.0.1 driftfile /var/lib/ntp/ntp.drift server xx.xx.xx.xx minpoll 4 maxpoll 4 prefer server xx.xx.xx.yy minpoll 4 maxpoll 4 restrict xx.xx.xx.xx restrict xx.xx.xx.yy b3) what about this case b3) below? Is time taken for the ntp-client according to order of lines - i mean the xx.xx.xx.xx is taken as time source? or the 2nd server xx.xx.xx.yy is preferred? restrict default noquery nomodify notrap restrict 127.0.0.1 driftfile /var/lib/ntp/ntp.drift server xx.xx.xx.xx minpoll 4 maxpoll 4 server xx.xx.xx.yy minpoll 4 maxpoll 4 prefer restrict xx.xx.xx.xx restrict xx.xx.xx.yy Thanks for the explanation. Peter _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
