NTP Sync not working

book

Article ID: 170408

calendar_today

Updated On:

Products

ProxySG Software - SGOS

Issue/Introduction

  • Proxy not getting time from NTP Server.
  • Event log shows "NTP: Receive timeout, retrying NTP Server".

"NTP: Receive timeout, retrying NTP Server"

Resolution

If you filter collected PCAP as ntp, you will see followings in non-working condition:


In working condition, you see like:

  • Notice here, in non-working condition, you never see server response for NTP query.
  • This issue is usually caused by FireWall policy blocking.
  • NTP works on port 123 which needs to be allowed in FireWall.

Attachments