Auto DoS features blocking UEFI PXE Boot

If you enable the Auto DoS feature on later 1920 Office Connect models, traffic is blocked based on one of these conditions:

  • the source port (TCP / UDP) is identical to the destination port (NTP, SYSLOG, etc)
  • the source port (TCP / UDP) is ‘privileged’ thus in the range of 1 -1023

You can find/disable it in the section “Security” and then “Advanced security”.

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