Hi CentOS users
We are running CentOS 4.5 with NTP 4.2.0.
# cat /etc/ntp.conf
restrict default ignore
restrict dns1.xxx.xxx mask 255.255.255.0 nomodify notrap noquery
restrict dns2.xxx.xxx mask 255.255.255.0 nomodify notrap noquery
restrict 127.0.0.1
server dns1.xxx.xxx
server dns2.xxx.xxx
fudge 127.127.1.0 stratum 10
driftfile /etc/ntp/drift
broadcastdelay 0.008
authenticate no
The problem is that other hosts are able to synchronize the time from
our servers. How to disable that?
# lsof -i :123
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
ntpd 4874 ntp 4u IPv4 35805 UDP *:ntp
ntpd 4874 ntp 5u IPv6 35806 UDP *:ntp
ntpd 4874 ntp 6u IPv4 35807 UDP localhost.localdomain:ntp
ntpd 4874 ntp 7u IPv4 35808 UDP xxx:ntp
ntpd 4874 ntp 8u IPv4 35809 UDP xxx:ntp
ntpd 4874 ntp 9u IPv4 35810 UDP xxx:ntp
ntpd 4874 ntp 10u IPv4 35811 UDP xxx:ntp
NTP listens on every interface.
cheers
Simon
--
XMPP: sjolle@xxxxxxxxxxxxxxx
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