ntp 服务器的搭建
windows :
系统版本：windows 10
Windows+r or Windows + s 搜索 regedit 打开注册表编辑器
1、在注册表中 找到 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config 该目录，双击该目录下的 Announce Flags，把值设置成5
2、再输入注册表路径HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer，双击NtpServer下的Enabled启用文件 将值设置成1
3、命令行输入 net stop w32time ,如服务已经开启先关闭服务，随后开启服务 net start w32time (net 没有 restart 命令)
4本地测试：w32tm /stripchart /computer:127.0.0.1
报错结果：
正在跟踪 127.0.0.1 [127.0.0.1:123]。 当前时间是 2022/10/20 16:07:42。 16:07:42, 错误: 0x80072746
成功结果
当前时间是 2022/10/20 16:16:16。 16:16:16, d:+00.0002671s o:+00.0000687s [ * ]
Linux：
操作环境：Linux raspberrypi 5.10.17-v7l+
sudo apt-get install ntp
然后配置 /etc/ntp.config 文件
配置如下
# ntp.conf driftfile /var/lib/ntp/drift pidfile /var/run/ntpd.pid logfile /var/log/ntp.log # Access Control Support #restrict 114.84.0.0 mask 255.255.0.0 limited kod nomodify notrap nopeer noquery restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery restrict 127.0.0.1 # local clock server 127.127.1.0 fudge 127.127.1.0 stratum 10 restrict ntp1.aliyun.com nomodify notrap nopeer noquery restrict ntp1.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp10.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp11.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp12.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp2.aliyun.com nomodify notrap nopeer noquery restrict ntp2.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp3.aliyun.com nomodify notrap nopeer noquery restrict ntp3.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp4.aliyun.com nomodify notrap nopeer noquery restrict ntp4.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp5.aliyun.com nomodify notrap nopeer noquery restrict ntp5.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp6.aliyun.com nomodify notrap nopeer noquery restrict ntp6.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp7.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp8.cloud.aliyuncs.com nomodify notrap nopeer noquery restrict ntp9.cloud.aliyuncs.com nomodify notrap nopeer noquery server ntp1.aliyun.com iburst minpoll 4 maxpoll 10 server ntp1.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp10.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp11.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp12.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp2.aliyun.com iburst minpoll 4 maxpoll 10 server ntp2.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp3.aliyun.com iburst minpoll 4 maxpoll 10 server ntp3.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp4.aliyun.com iburst minpoll 4 maxpoll 10 server ntp4.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp5.aliyun.com iburst minpoll 4 maxpoll 10 server ntp5.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp6.aliyun.com iburst minpoll 4 maxpoll 10 server ntp6.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp7.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp8.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10 server ntp9.cloud.aliyuncs.com iburst minpoll 4 maxpoll 10
测试：ntpdate -d 127.0.0.1
局域网使用ntp 记得设备端防火墙开放端口 udp123
