树莓派NTP服务器搭建
DynamicLoader 3/7/2020 树莓派NTP
# 准备
- 树莓派，已经配置好网络的
- Xshell （鼠标键盘也行）
# 安装NTP服务器
sudo -i
apt-get install ntp
apt-get install ufw #防火墙配置程序
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# 配置NTP服务器(sudo下)
nano /etc/ntp.conf
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然后照着下面的中文注释改：
/etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
driftfile /var/lib/ntp/ntp.drift
# Leap seconds definition provided by tzdata
leapfile /usr/share/zoneinfo/leap-seconds.list
# 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
# You do need to talk to an NTP server or two (or three).
#server ntp.your-provider.example
server ntp.ntsc.ac.cn #这里写要同步的服务器地址
# pool.ntp.org maps to about 1000 low-stratum NTP servers. Your server will
# pick a different set every time it starts up. Please consider joining the
# pool: <http://www.pool.ntp.org/join.html>
pool 0.debian.pool.ntp.org iburst
pool 1.debian.pool.ntp.org iburst
pool 2.debian.pool.ntp.org iburst
pool 3.debian.pool.ntp.org iburst
# 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
restrict 192.168.10.0 mask 255.255.255.0 nomodify
# 上面的一行是限制访问，格式：
# restrict <IP地址，请填写本网地址，并把最后一个byte改成0> mask <子网掩码> nomodify
#
# nomodify是不允许客户端更改，允许对时
# 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
......省略...........
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保存退出。
然后执行：
sudo service ntp restart
ps -ef | grep ntp
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看到下面的内容，就配置好了NTP服务器：
ntp 1066 1 0 18:10 ? 00:00:00 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -u 104:110
pi 1069 1034 0 18:10 pts/0 00:00:00 grep --color=auto ntp
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# 配置防火墙(sudo下)
ufw enable
ufw deny
ufw allow 123/udp #开启UDP协议123端口
ufw allow 22/tcp #开启ssh端口
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然后你会看到：
Status: active
To Action From
-- ------ ----
123/udp ALLOW Anywhere
22/tcp ALLOW Anywhere
123/udp (v6) ALLOW Anywhere (v6)
22/tcp (v6) ALLOW Anywhere (v6)
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好了，现在重启系统(sudo reboot)，就OK了！