Cannot sync network time (NTP) on Win10 on BSNL FTTH

[vishalrao]

@vishalrao Do you have a Raspberry Pi ?

Nope I don't... why? were you going to suggest running a local NTP server?

I can run that "Net Time" tool in windows service mode to do the time updates if I wanted I guess.

 

[shashankb]

No if many devices need updation like IOT devices, IP Cameras, TV Sticks,etc , then NTP server is helpful

 

[Reklez]

@vishalrao I synced just before posting this and it worked . I had this problem for months and somehow it started working now. Previously I was just using the ONT but now I am using my ONT in bridge mode connected to a TP-Link WR840N router . Im not sure if that is what fixed it.

 

[Reklez]

Also try this
go to run -> "services.msc" -> look for "Windows Time" service -> change its startup mode to automatic

 

[vishalrao]

So I just got a DM on twitter from @Anurag Bhatia giving me some email contacts to write to explain about this issue, which I have just now done.

Let's see if anything fruitful comes out of this! Fingers crossed

Thanks Anurag!

 

[vishalrao]

I got a call from someone in the Bangalore NOC today asking me about the issue which I explained as best I could. Now waiting for a follow-up from their side for any further updates.

 

[Reklez]

Also try this
go to run -> "services.msc" -> look for "Windows Time" service -> change its startup mode to automatic

@vishalrao did you try this?

 

[vishalrao]

Yeah didn't make a difference...

 

[JB701]

I read through this thread and @vishalrao is correct. I did WireShark on UDP Port 123, first on my regular WiFi Interface on Windows 10 pressing sync button (top picture) and the source port isn't random as it should be (same as dst port). MS must have screwed up?

Bottom one is a picture of WireShark on UDP Port 123 but on WSL Interface, this time I did "ntpdate -q time.windows.com" on my Ubuntu WSL. Source Port is random on Linux.

Someone should complain to MS About this.

NTP does seem to work fine with random port on BSNL. Here is a RIPE Atlas measurement (i assume Atlas uses random source port as its running on Linux?). Atlas Console

@vishalrao If you have a fancier firewall such as Mikrotik or PFSense or Openwrt , you maybe able to rewrite the src port 123 to a random port using NAT/Firewall Rules.

 

[JB701]

Change source port of NTP requests on router using iptables

My ISP blocks outbound udp port 123. This is preventing ntpd from getting ntp updates. How do I get my router (Asus router running Asuswrt Merlin) to automatically change the port number from 123 to

superuser.com

Related maybe?