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如何让我的笔记本电脑在不连接互联网的情况下充当 LAN 中的 NTP 服务器？

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如何让我的笔记本电脑在不连接互联网的情况下充当 LAN 中的 NTP 服务器？

我需要将我的笔记本电脑设置为我自己的局域网内的 NTP 服务器。

据我所知，我只能在以下情况下将客户端同步到局域网中的 NTP 服务器：

a.) There is an internet connection.
b.) When I tried to connect to another LAN without internet access, I still managed to sync the computer.

我连接了两个 LAN：

1.) 192.168.1.x subnet with internet
2.) 192.168.2.x subnet without internet

这是服务器。如您所见，当我在没有互联网的情况下连接到 LAN 时尝试重新启动服务时，我无法与客户端同步。

服务器

瞧，我同步失败了。但是，如果我连接到互联网，一切就都正常了。如何设置 NTP 服务器，以便即使我没有任何互联网连接，我的笔记本电脑仍然可以充当 NTP 服务器，我的 LAN 中的客户端将能够同步到该服务器？

客户

我还在这里包含了我的 /etc/ntp.conf，因为它可以提供有关我缺少什么的信息。

# /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. server 0.ubuntu.pool.ntp.org server 1.ubuntu.pool.ntp.org server 2.ubuntu.pool.ntp.org server 3.ubuntu.pool.ntp.org server 127.127.1.0 fudge 127.127.1.0 stratum 10

# Use Ubuntu's ntp server as a fallback. server 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 restrict -6 default kod notrap nomodify nopeer noquery

# Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1

# 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 192.168.1.255
#broadcast 192.168.2.255

# 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

# Allow LAN machines to synchronize with this ntp server
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
#restrict 192.168.2.0 mask 255.255.255.0 nomodify notrap

答案1

我偶然发现了一个解决办法。:-)

编辑文件 /etc/ntp.conf

#add these
server 127.127.1.0 iburst
fudge 127.127.1.0 stratum 10

并注释掉所有其他服务器。:-)

PS 我不太确定 iburst。我猜也可以不包含它。

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