ntp appliance

BackgroundWhen the server is more, time is accurate or not, the same is a big problem. Although this problem is always overlooked, it is necessary to unify the time. Here's how to configure a Linux time server within a LAN.Configuration of the environment and requirements:1. Assume that a Linux machine time server with IP 192.168.0.240 is in the 192.168.0.0 network segment.2.192.168.0.240 Server can Sisu network, can be synchronized with the more authoritative public network time server3. Automa

I remember when I first started RTP/RTCP two years ago, I encountered a problem about how to calculate the NTP timestamp in RTCP. Someone recently asked this question, so I wanted to post it, for your reference, give suggestions, and exchange ideas to promote progress. I remember a customer said that using openrtsp (open source, you can get it from www.live555.com) could not record the RTP stream we sent out, so I went to another one, I tried to find

There are tow pen source software related to the NTP in Linux, the first is ntpdate, the second is ntpd. you can install them as following: Apt-Get installl NTP; Apt-Get install openntpd; Or emerge NTP; emerge openntpd. NtpdateCan be run manually as necessary to set the host clock, or it can be run from the host STARTUP script to set the clock at boot time. this

Configuration on node 1:More/etc/NTP. conf Restrict default ignore Restrict 192.168.0.0 mask 255.255.255.0 notrap nomodify Server 162.105.129.27 # time server on the Internet Server 127.127.1.0 # local clock Fudge 127.127.1.0 stratum 10 Driftfile/var/lib/NTP/drift Broadcastdelay 0.008 Keys/etc/NTP/keys Configuration on node 2:More/etc/

In an Oracle 10G environment, if you want to build a cluster, you need to synchronize the clock, which requires an NTP server.1, on the timing system machine, edit/etc/ntp.confRetrict default NomodifyRestrict 127.0.0.1Server 127.127.1.0Fudge 127.127.1.0 Stratum 8Driftfile/var/lib/ntp/driftBroadcastdelay 0.008Then restart the NTPD serviceService NTPD Restart2, on the other host to synchronize the clock canNt

The client first installs NTP Yum install ntpshell> ntpdate 95.222.122.210 shell> ntpdate 202.112.10.60 shell> ntpdate 192.93.2.20 Note: When the client Synchronizes time, the following error occurs: No server suitable for synchronization found. Cause: After you restart the NTP service on the NTP server, it may take five minutes for the

One, NTP server (ip:192.168.1.101) Installation: Yum install-y NTP Firewall allowed: iptables-a input-i $EXTIF-P udp-s 192.168.1.0/24--dport 123-j ACCEPT Configuration: vim/etc/ntp.confRestrict 192.168.1.0 mask 255.255.255.0 nomodify notrapServer before # Remove Start:/ETC/INIT.D/NTPD startChkconfig ntpd on Observation: Ntpq-p or Ntpstat Second,

NTP server1. Enter Rpm-qa|grep NTP to see if an NTP server is installed2. If the Yum-y install NTP installation is not installed3. Modify/etc/ntp.conf Add the original server annotated local server 127.127.1.14. Restart the service systemctl restart Ntpd.service use ntpq-p to see if it is a local ntpd5. Client Configur

cve-2013-5211 Vulnerability Description: Cve-2013-5211 was first announced January 10, 2014, because NTP itself does not verify the sender's source IP address. This is similar to the DrDoS (distributed reflection denial of service attack) used by the DNS parser. The attacker hack sent a forged message to the NTP server server A, changing the source IP address in the packet to the IP address of victim clien

Install and configure the NTP server in CentOSIntroduction See wikipedia: Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.Refer to Baidu Encyclopedia: NTP is a Network Time Protocol used to synchronize the Time of each computer in the Network. Environment2

recently, found that the company domain member user time and the domain server time is not synchronized, to achieve: 1, the domain member server and intra-domain client and domain NTP server synchronization, 2, the domain NTP server as the client and the external NTP server synchronization ( configure Windows Time service to use an external time source ).Workarou

1 . The importance of time synchronizationTime synchronization can ensure the normal operation of the business, such as data synchronization, such as the batch execution of the system planning task. such as2. Check your system time .[[Email protected] ~]# Date3. System modification Time# date-s "2015-10-17 19:00:00"After the modification, remember to execute the CLOCK-W, write the system time to the CMOS, to ensure that the restart will take effect.4 . Setup of hardware time View: [[email protec

When installing Oracle 11g RAC, we need to configure the NTP service. In the case of a virtual machine, there are many ways to configure the clock synchronization method, either using VMware's own clock synchronization feature or directly using a local node as a time server. This article describes the clock server that configures the NTP method directly. 1, view the two-node hosts configuration [Root@node

Linux time synchronization configuration.I. Using the Ntpdate command1.1 When the server can link to the extranet# CRONTAB-EAdd a line:*/1 * * * * ntpdate 210.72.145.44210.72.145.44 is the China National Time Service Center server address, so that the machine every 1 minutes can be synchronized with the National Time Service center.Note: When using the Ntpdate command, the NTPD service must be turned off, otherwise the NTP socket is used, exiting erro

Openssh/ntp/ftp vulnerabilities and opensshntpftp Vulnerabilities Common reinforcement for these three vulnerabilities requires an official vulnerability upgrade package for the operating system. In this case, the following is not general:Openssh: Modify the ssh version:Whereis ssh // view the ssh directoryCd to this directoryCp ssh. bak // back up sshSsh-V // view the ssh VersionSed-I's/OpenSSH_6.9p1/OpenSSH_7.2p2/G' ssh // modify the version. The ve

You need to set up a time synchronization server in the LAN to unify the system time of each client and server. On the Internet, most of the NTP servers are indeed based on Linux. search, experiment, and summary: Write an article using the w32time service that comes with windwos2003 for time synchronization. windows 2003 Server is successfully configured. 1. by default, the standalone server Windows Server 2003 works as an

/********************************************************************** * buildroot NTP Network clock synchronization * Description: * File system requires network clock synchronization, so use NTP to do this thing. * 2016-12-1 Shenzhen Nanshan Ping Shan village Zengjianfeng ************************************************************** *******/First, buildroot configuration:1. TimeZone: ┌──────────────────

CentOS since 7.0, NTP has made a service, which means that it can run a daemon to automatically synchronize time instead of writing commands to a scheduled task like the 5 and 6 versions, which is very helpful when doing a cluster service.Installing NTP[[email protected] ~]# Yum install NTP ntpdate-yConfiguration file/etc/ntp.conf[Email protected] ~]# vim/etc/ntp

Two ways to synchronize NTP: 1. Synchronize directly with the Ntpdate command 2. Smooth sync with NTPD serviceThe defect of the direct synchronization method: It will cause the scheduled task to be done again.The offset of the synchronization time of the smooth synchronization is not too steep, according to the offset, the mean variance equivalent of each synchronization a little bit, synchronization fully synchronized well takes a long time. So gener

First step to install NTPYum Install NTPSecond step, find the closest time synchronization serverHttp://www.pool.ntp.org/zone/asiaThe third edition of/etc/ntp.confServer 127.127.1.0 iburst # Local Clock when the external time server is unavailable, use the native time as the standard for the time serviceFudge 127.127.1.0 Stratum #这个值不能太高0-15, too high will be an errorFourth StepAdd an IP segment to allow accessRestrict 192.168.1.0 netmask 255.255.255.0 nomodify notrapFifth Step Configuring the f