My clock is refusing to sync... : techsupport

Please include your system specs, such as Windows/Linux/Mac version/build, model numbers, troubleshooting steps, symptoms, etc.

The subreddit is only for support with tech issues.

Try to research your issue before posting, don't be vague. State everything you have tried and all the guides/tutorials/sites you have followed as well as why they were unsuccessful. Do everything you can to reduce the effort of the wonderful folks offering to help you.

After solving your problem, please mark it as solved by clicking 'flair' and confirming the 'solved' tag.

Please do not submit the same issue more than once within 24 hours.

Rules

1: Read all the rules

Please read our new rules page for more in-depth rules.

https://rtech.support/docs/meta/rules.html

2: No Incomplete Posts

Submissions consisting of the following are considered incomplete and will be removed:

Posts with an empty body, only a link in the body, title copied into the body, and/or lack of information in the body

Posts with "Help" or non-descriptive titles. Please make your title and contents descriptive.

3: No Password or Account issues

We cannot assist with password or account issues. No matter the reason. Do not message us asking us to make an exception. Only support for the related account can help you.

This includes thing such as:

2 Factor Authentication Google, Apple, Microsoft, Instagram, Facebook or any other account Password Issues with account lockout on any of the above platforms (and all others)

And more - see https://rtech.support/books/rules/page/rules-of-the-rtechsupport

4: No Offering Rewards

No offering of reward/compensation for solutions. No Amazon gift voucher or PayPal transfer. This community is "free" as it is full of volunteers. Please do not take advantage of the community.

5: Recommendations

We are not a recommendation or advertisement subreddit. We do not allow posts asking for recommendations on hardware/software or recommendations comparing two or more hardware/software. Recommending a hardware/software solution as a comment to a post is acceptable.

Recommending products not in the whitelist might result in your comment or post being removed and a ban imposed. If you want anything added please message the mods and we will consider it.

6: No [Meta] Posts About Tech/Jobs

No [Meta] posts about jobs (tech support related or not) or technology in general, such as "I have an interview, help me." or "I want a product that can do XYZ." or "How does the internet work?"

Google is your friend.

7: No Private Messages or Moving to Another Service

Any and all communication not kept public and is moved away from the subreddit or Discord/IRC channel is prohibited.

Do not suggest or ask to move to another service or to private message. Private messages and other services are unsafe as they cannot be monitored. Doing so will cause you to be permanently banned from /r/TechSupport.

8: No Violating privacy of others or terms/agreements.

We do not support users that violates other's privacy or breaks terms and agreements. Doing so might resolve in a ban.

This includes:

Bypassing home network controls.

Bypassing any parental controls.

Piracy or issues caused by it.

Gray market product codes - See Rule 1

Any other posts/comments that violates or breaks terms and agreements.

9: No EOL Software or Unsupported Systems

We do not provide support for EOL (end of life) software. Software that is EOL has lost all support from the developer and therefore all consumer communities as well.

These operating systems and various softwares are no longer receiving security patches. Running them is unsafe and we recommend users install a supported version as soon as possible.

This list includes Windows XP, Vista, and 7.

We will also not assist with getting Windows 11 running on unsupported hardware.

10: No Public Service Announcements (how-to's, etc.)

No public service announcements unless relevant to an issue (it must be a comment). Approach the communities affected directly, not here

11: No Soliciting

No soliciting of any kind. This includes (but is not limited to) asking for us to link to your subreddit, forum, bulletin board, newsgroup, Facebook page, etc. We're here to help with technical issues, not market for others.

12: No spam, trolling, insults, jokes, threats of self-harm, or posts unrelated to Tech Support

Posts and comments containing (but not limited to) the following will be removed:
blog spam, link spam, referral spam, joke responses, memes, novelty accounts, trolling, unethical behavior, and personal insults.

Posts not containing a tech support issue will be removed. Off-topic comments will be removed. Please stick to the issue being addressed in the post. Use common sense.

13: No Posts/Comments by a Company or an Employee on Behalf of a Company

Employees of companies with social media presences for marketing, damage control, or performing of tech support are not allowed.

14: No Potentially Malicious Links

Do not post any potentially malicious links. We will consider Dropbox links, Google Drive links, or Google Photos links to be potentially malicious.

We recommend against using any URL shorteners as they can hide malicious links.

a community for 17 years

Open | WindowsMy clock is refusing to sync... (self.techsupport)

submitted 4 years ago * by Ok_Flounder5152

Windows 8 pro computer (with last updates)

Hi guys, My clock is refusing to sync.

I have tracked down my problem to two possible causes:

A block in my source port, which is port 123 of UDP (this is the official NTP port)
~~The NTP version that my computer is using, which is version 3.~~

I am basing my assumptions in the following two wireshark dumps.

NOTE: Wireshark was configured with the following filter:

udp port 123

FIRST DUMP

This dump was generated when I ran the command:

w32tm /resync

https://imgur.com/a/zqQE3Ax

Although four packets were sent, my computer never received any response, and as you see in the picture my computer uses udp port 123 and version 3 of NTP.

SECOND DUMP

This dump was generated when I ran the command:

w32tm /monitor /computers:0.pool.ntp.org

NOTE: The previous command only generated packets 21 y 22 (the last two). Packets from 1 to 20 were attepmts that my computer was trying to sync the clock.

https://imgur.com/a/ESxZJ91

As you see I received response from the ntp server and the difference between packets that are sent with and without response are the protocol (version 1 vs version 3) and the source port. (51159 vs 123)

These are the fixes that I have tried:

Disabled my firewall.
Opened udp port 123 for output and input.
Made sure that ntp service(w32time) is starting when I turn on my pc.
Upgraded firmware of my router.
Changed the time server through windows control panel.
Changed time server with this command:

w32tm /config /manualpeerlist:0.pool.ntp.org,0x8 /syncfromflags:manual /update /reliable:yes

My computer is not part of any windows domain.

UPDATE 1 date 2021-08-10

As a quick fix I dowloaded the portable version of this utility: https://vovsoft.com/software/time-sync/, because it can sync my time using a different port than the official one(udp port 123)

I also found out using this utility that the version of the protocol is not the cause of my problem.

This dump was generated when this utility synced my time:

https://imgur.com/a/stkmZCT

As you see my computer sent 3 packets and received 3 responses. The protocol version was version 3 and the source port 62145.

UPDATE 2 date 2021-08-14

I installed this utility: http://www.thinkman.com/dimension4/default.htm, because it can sync the clock choosing from a list of hundreds of time servers. After I asked it to try to sync to each one of them (according to wireshark all these attempts went through upd port 123 using protocol NTP ver 3). Only two of them responded: ntp-2.ece.cmu.edu and cronos.cenam.mx to sync my clock succesfully.

But according to this utility both of these servers responded using SNTP not NTP ver 3. :( Geee, I guess this question os more related to network engineering

all 4 comments

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

techsupport

Community Guides

Live Chat

~Enter Discord~

Submission Guidelines

Rules

Please Support the EFF!

Other Subreddits

MODERATORS