[Solved] ROS 6.36: NTP Client not working

RouterOS General
1

Hi,

I am trying to get my NTP Client running on two different Mikrotik devices but non of them work. Both have ROS 6.36, one device is a mAP, the other one a RB3011. The mAP uses Tool/SNTP Client with NTP Server “0.de.pool.ntp.org” which resolves in IP 148.251.68.100. After doing apply nothing is getting received but logs show instead:

19:53:09 echo: ntp,debug Wait for 0 seconds before sending next message
19:53:09 echo: ntp,debug,packet sending to 188.40.99.69 NTP packet (48 bytes)
19:53:09 echo: ntp,debug,packet VN=4
19:53:09 echo: ntp,debug,packet Mode=3 (Client)
19:53:09 echo: ntp,debug,packet TransmitTimestamp=db670c051702a348
19:53:09 echo: ntp,debug Wait for 16 seconds before sending next message

19:53:25 echo: ntp,debug Wait for 16 seconds before sending next message

19:53:41 echo: ntp,debug,packet sending to 148.251.68.100 NTP packet (48 bytes)
19:53:41 echo: ntp,debug,packet VN=4
19:53:41 echo: ntp,debug,packet Mode=3 (Client)
19:53:41 echo: ntp,debug,packet TransmitTimestamp=db670c251660a201
19:53:41 echo: ntp,debug Wait for 16 seconds before sending next message

Internet connection is working fine on this device. Connection works over a FritzBox 7490… Ping is working to NTP Server 148.251.68.100.
Any help would be appreciated…

Regards toby

2

@Mikrotik
I am reading of a lot of NTP issues in RouterOS. Are you still investigating this issue or do you see it as solved? Currently I don’t know how to debug this problem further. Should I send a Supout.rif?

3

I can only add that I use NTP on MikroTik in different versions and configurations (with and without the server)
and I have never seen such issues. They may be caused by external factors like firewall filters inside and
outside the router, settings of connection tracking, etc.

4

Problem is solve now. It seems that the FritzBox was blocking this traffic somehow. Now I use bridged modem connected to the RB3011 and it works…