NTP - Revision history

Deepak at 06:25, 25 August 2025

2025-08-25T06:25:29Z

Deepak at 05:39, 18 August 2025

2025-08-18T05:39:21Z

Bhuvnesh at 06:34, 14 August 2025

2025-08-14T06:34:59Z

Bhuvnesh: updated ntp server ips

2025-08-14T06:33:54Z

updated ntp server ips

Deepak at 05:20, 14 August 2025

2025-08-14T05:20:25Z

Deepak at 12:19, 13 August 2025

2025-08-13T12:19:11Z

Deepak: Replaced content with "== Related pages == * About NTP service ( Wikipedia )"

2025-08-13T12:08:59Z

Replaced content with "== Related pages == * About NTP service ( Wikipedia )"

Deepak: Created page with "==
2025-08-13T10:40:51Z

Created page with "== <span style="box-sizing: border-box; color: rgb(0, 29, 53); font-family: "Google Sans", Arial, sans-serif; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;"><big style="box-sizing: border-box;">'''NTP (Network Time Protocol) service'''</big> ==
<span style="box-sizing: border-box; color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;">Network Time Protocol (NTP) Service allows devices to set their date/time clock to a known-good clock, and to keep their clock synchronized with a high degree of accuracy.

<span style="box-sizing: border-box; color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;">SNU IT provides several NTP servers for use by devices attached to the campus network. our servers supports version 4 of the Network Time Protocol, and provide backward-compatibility with version 1, version 2, and version 3. These NTP settings will work only within SNU Campus Network
{| class="wikitable" style="box-sizing: border-box; font-size: 16.8143px; caption-side: top; border-collapse: collapse; overflow-x: auto; word-break: normal; background-color: rgb(248, 249, 250); color: rgb(32, 33, 34); margin: 1em 0px; border: 1px solid rgb(162, 169, 177); font-family: Arial, "sans-serif"; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 500; letter-spacing: normal; orphans: 2; text-align: start; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; width: 1120px;"
! style="background-color:rgb(234, 236, 240);vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" |Step
! style="background-color:rgb(234, 236, 240);text-align:center;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" |Servers
! style="background-color:rgb(234, 236, 240);text-align:center;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" |IP
|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"
| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |1
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |ntp01.snu.edu.in
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |
|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"
| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |2
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |ntp02.snu.edu.in
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |
|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"
| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |3
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |ntp03.snu.edu.in
| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" |
|}

=== Instructions to setup NTP on your machine ===

# Windows 10
# Windows 11
# Linux
# Mac

== Related pages ==

* [[wikipedia:Network_Time_Protocol|About NTP service ( Wikipedia )]]

@@ Line 13: / Line 13: @@
 * Supports '''NTP version 4''', with backward compatibility for versions 1, 2, and 3.
 * Available '''only within the SNU Campus Network'''.
 == SNU NTP Servers ==

@@ Line 31: / Line 31: @@
 |3
 |<code>ntp03.snu.edu.in</code>
-|''10.3.36.243''
+|''10.3.36.244''
 |}
 <blockquote>💡 ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote>

@@ Line 50: / Line 50: @@
 # Edit the NTP configuration file: <span><span><span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span>  <span> </span></span>
 # Add the serv<span><span><span></span></span></span>er entries:    server ntp01<span><span><span></span></span></span>.snu.edu.in    server ntp02.snu.edu.in    server ntp03.snu.edu.in
-# Restart the NTP service: <span><span><span></span>  </span> <code preview="Code" class="language-Shell">sudo systemctl restart n</code><span><span></span></span><code class="language-Shell" preview="Code">tp </code> <span>  </span></span>
+# Restart the NTP service: <span><span><span></span>  </span> <code preview="Code" class="language-Shell">sudo systemctl restart n</code><span><span></span></span><code class="language-Shell" preview="Code">tp</code> <span>  </span></span>
 === 🍎 macOS ===

@@ Line 23: / Line 23: @@
 |1
 |<code>ntp01.snu.edu.in</code>
-|''(IP to be added)''
+|''10.3.36.242''
 |-
 |2
 |<code>ntp02.snu.edu.in</code>
-|''(IP to be added)''
+|''10.3.36.243''
 |-
 |3
 |<code>ntp03.snu.edu.in</code>
-|''(IP to be added)''
+|''10.3.36.243''
 |}
 <blockquote>💡 ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote>

@@ Line 48: / Line 48: @@
 # Open terminal.
-# Edit the NTP configuration file: <span><span><span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span><span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span></span>
+# Edit the NTP configuration file: <span><span><span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span>  <span> </span></span>
-# Add the server entries:    server ntp01.snu.edu.in    server ntp02.snu.edu.in    server ntp03.snu.edu.in
+# Add the serv<span><span><span></span></span></span>er entries:    server ntp01<span><span><span></span></span></span>.snu.edu.in    server ntp02.snu.edu.in    server ntp03.snu.edu.in
-# Restart the NTP service: <span><span><span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span>  <code preview="Code" class="language-Shell">sudo systemctl restart ntp </code> <span><span></span>  <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span></span>
+# Restart the NTP service: <span><span><span></span>  </span> <code preview="Code" class="language-Shell">sudo systemctl restart n</code><span><span></span></span><code class="language-Shell" preview="Code">tp </code> <span>  </span></span>
 === 🍎 macOS ===
-# Open '''System Settings''' → '''Date & Time'''.
+#<span><span><span></span></span></span>Open '''System Settings''' → '''Date'''<span><span><span></span></span></span> '''& Time'''.
 # Unlock settings and enable '''Set date and time automatically'''.
 # Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>).

← Older revision		Revision as of 12:19, 13 August 2025
Line 1:		Line 1:
		+	<div style="font-family:'Segoe UI';font-size:14px;font-style:normal;font-weight:400;line-height:20px">
		+	----
		+
		+	= 🕒 Network Time Protocol (NTP) Service =
		+
		+	== Overview ==
		+	The '''Network Time Protocol (NTP)''' service ensures that devices connected to the SNU campus network maintain accurate and synchronized system clocks. This is essential for time-sensitive operations, logging, security protocols, and coordination across systems.
		+
		+	== Key Features ==
		+
		+	* Synchronizes device clocks with a known-good reference.
		+	* Maintains high accuracy across the network.
		+	* Supports '''NTP version 4''', with backward compatibility for versions 1, 2, and 3.
		+	* Available '''only within the SNU Campus Network'''.
		+
		+	== SNU NTP Servers ==
		+	The following servers are available for use within the campus:
		+	{\| class="wikitable"
		+	!Step
		+	!Server Address
		+	!IP Address
		+	\|-
		+	\|1
		+	\|<code>ntp01.snu.edu.in</code>
		+	\|''(IP to be added)''
		+	\|-
		+	\|2
		+	\|<code>ntp02.snu.edu.in</code>
		+	\|''(IP to be added)''
		+	\|-
		+	\|3
		+	\|<code>ntp03.snu.edu.in</code>
		+	\|''(IP to be added)''
		+	\|}
		+	<blockquote>💡 ''Note: These servers are accessible only from devices connected to the SNU campus network.''</blockquote>
		+	----
		+
		+	== Setup Instructions ==
		+
		+	=== 🖥️ Windows 10 / Windows 11 ===
		+
		+	# Open '''Control Panel''' → '''Date and Time''' → '''Internet Time''' tab.
		+	# Click '''Change settings'''.
		+	# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>) and click '''Update now'''.
		+	# Click '''OK''' to save.
		+
		+	=== 🐧 Linux ===
		+
		+	# Open terminal.
		+	# Edit the NTP configuration file: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span></span>
		+	# Add the server entries: server ntp01.snu.edu.in server ntp02.snu.edu.in server ntp03.snu.edu.in
		+	# Restart the NTP service: <span><span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span> <code preview="Code" class="language-Shell">sudo systemctl restart ntp </code> <span><span></span> <code preview="Code" class="language-Shell">sudo nano /etc/ntp.conf </code> <span></span></span></span>
		+
		+	=== 🍎 macOS ===
		+
		+	# Open '''System Settings''' → '''Date & Time'''.
		+	# Unlock settings and enable '''Set date and time automatically'''.
		+	# Enter one of the NTP server addresses (e.g., <code>ntp01.snu.edu.in</code>).
		+
		+	----
		+
		+	== Support ==
		+	For assistance or troubleshooting, please contact the '''SNU IT Helpdesk''' ithelpdesk@snu.edu.in.
		+	----</div>
		+
	== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==		== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==

	* [[wikipedia:Network_Time_Protocol\|About NTP service ( Wikipedia )]]		* [[wikipedia:Network_Time_Protocol\|About NTP service ( Wikipedia )]]

← Older revision		Revision as of 12:08, 13 August 2025
Line 1:		Line 1:
−	== <span class="mw-headline" style="box-sizing: border-box;" id="NTP_.28Network_Time_Protocol.29_service"><span style="box-sizing: border-box; color: rgb(0, 29, 53); font-family: "Google Sans", Arial, sans-serif; font-size: 18px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;"><big style="box-sizing: border-box;">'''NTP (Network Time Protocol) service'''</big></span></span> ==
−	<span style="box-sizing: border-box; color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;">Network Time Protocol (NTP) Service allows devices to set their date/time clock to a known-good clock, and to keep their clock synchronized with a high degree of accuracy.</span>
−
−	<span style="box-sizing: border-box; color: rgb(55, 65, 81); font-family: Inter; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; display: inline !important;">SNU IT provides several NTP servers for use by devices attached to the campus network. our servers supports version 4 of the Network Time Protocol, and provide backward-compatibility with version 1, version 2, and version 3. These NTP settings will work only within SNU Campus Network</span>
−	{\| class="wikitable" style="box-sizing: border-box; font-size: 16.8143px; caption-side: top; border-collapse: collapse; overflow-x: auto; word-break: normal; background-color: rgb(248, 249, 250); color: rgb(32, 33, 34); margin: 1em 0px; border: 1px solid rgb(162, 169, 177); font-family: Arial, "sans-serif"; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 500; letter-spacing: normal; orphans: 2; text-align: start; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; width: 1120px;"
−	~~! style="background-color:rgb(234, 236, 240);vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" \|Step~~
−	~~! style="background-color:rgb(234, 236, 240);text-align:center;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" \|Servers~~
−	~~! style="background-color:rgb(234, 236, 240);text-align:center;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" class="" \|IP~~
−	~~\|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"~~
−	~~\| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|1~~
−	~~\| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|ntp01.snu.edu.in~~
−	~~\| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|~~
−	~~\|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"~~
−	~~\| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|2~~
−	~~\| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|ntp02.snu.edu.in~~
−	~~\| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|~~
−	~~\|- style="box-sizing: border-box; border-color: inherit; border-style: solid; border-width: 0px;"~~
−	~~\| style="vertical-align:middle;text-align:center;width:80px;box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|3~~
−	~~\| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|ntp03.snu.edu.in~~
−	~~\| style="box-sizing:border-box;border:1px solid rgb(162, 169, 177);padding:8px;" \|~~
−	\|}
−
−	~~=== <span class="mw-headline" style="box-sizing: border-box;" id="Instructions_to_setup_NTP_on_your_machine">Instructions to setup NTP on your machine</span> ===~~
−
−	~~# Windows 10~~
−	~~# Windows 11~~
−	~~# Linux~~
−	~~# Mac~~
−
	== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==		== <span class="mw-headline" style="box-sizing: border-box;" id="Related_pages">Related pages</span> ==

	* [[wikipedia:Network_Time_Protocol\|About NTP service ( Wikipedia )]]		* [[wikipedia:Network_Time_Protocol\|About NTP service ( Wikipedia )]]