سلام یه سناریو دارم :
یه اوبونتو سرور داریم و دو تا کلاینت در ویرچوال باکس. اوبونتو سرور هم NAT و هم host-only فعال است. کلاینت ها هم host-only هستند. هر سه ماشین هم دیگه را ping میکنند. روی اوبونتو سرور ntp نصب کردم. این کانفیگ ntp است.
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
driftfile /var/lib/ntp/ntp.drift
# Enable this if you want statistics to be logged.
statsdir /var/log/ntpstats/
statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable
# Specify one or more NTP servers.
# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for
# more information.
pool 0.ubuntu.pool.ntp.org iburst
pool 1.ubuntu.pool.ntp.org iburst
pool 2.ubuntu.pool.ntp.org iburst
pool 3.ubuntu.pool.ntp.org iburst
# Use Ubuntu's ntp server as a fallback.
#pool ntp.ubuntu.com
# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
# details. The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions>
# might also be helpful.
#
# Note that "restrict" applies to both servers and clients, so a configuration
# that might be intended to block requests from certain clients could also end
# up blocking replies from your own upstream servers.
# By default, exchange time with everybody, but don't allow configuration.
restrict -4 default kod notrap nomodify nopeer noquery limited
restrict -6 default kod notrap nomodify nopeer noquery limited
# Local users may interrogate the ntp server more closely.
restrict 127.0.0.1
restrict ::1
# Needed for adding pool entries
restrict source notrap nomodify noquery
# Clients from this (example!) subnet have unlimited access, but only if
# cryptographically authenticated.
#restrict 192.168.123.0 mask 255.255.255.0 notrust
# If you want to provide time to your local subnet, change the next line.
# (Again, the address is an example only.)
#broadcast 192.168.123.255
# If you want to listen to time broadcasts on your local subnet, de-comment the
# next lines. Please do this only if you trust everybody on the network!
#disable auth
#broadcastclient
#Changes recquired to use pps synchonisation as explained in documentation:
#http://www.ntp.org/ntpfaq/NTP-s-config-adv.htm#AEN3918
#server 127.127.8.1 mode 135 prefer # Meinberg GPS167 with PPS
#fudge 127.127.8.1 time1 0.0042 # relative to PPS for my hardware
#server 127.127.22.1 # ATOM(PPS)
#fudge 127.127.22.1 flag3 1 # enable PPS API
# To allow machines within the local network to synchronize
# their clocks with this server, but ensure they are
# not allowed to configure the server or used as peers
# to synchronize against, uncomment this line.
#
restrict 192.168.100.0 mask 255.255.255.0 nomodify nopeer notrap
اینم وضعیت فایروال در اوبونتو سرور پورت ۱۲۳
Status: active
To Action From
-- ------ ----
123/tcp ALLOW Anywhere
123 ALLOW Anywhere
OpenSSH ALLOW Anywhere
123/tcp (v6) ALLOW Anywhere (v6)
123 (v6) ALLOW Anywhere (v6)
OpenSSH (v6) ALLOW Anywhere (v6)
حالا روی کلاینت با دستور
sudo ntpdate -u 192.168.100.102
میخوام زمان را با اوبونتو سرور سینک کنم این ارور را میگیرم.
13 Dec 02:05:11 ntpdate[1279]: no server suitable for synchronization found
چطور میشه کاری کرد که خود اوبونتو سرور بشه ملاک زمان و نیازی نباشه به اینترنت وصل باشه؟ کلاینت ها فقط زمان خودشان را با زمان اوبونتو سرور سینک کنند؟