[ATL 5G R16] Problems connecting to the built-in management portal after configuring passthrough mode

Winbox allows (if everything is working correctly) in TWO ways:

  1. at L3 level (using IP) like any browser
  2. at L2 level (using MAC) using a proprietary protocol

BOTH connection methods may be inhibited by wrong firewall or other configuration settings (usually interface lists members or mac winbox server).

See:

Have you tried connecting via MAC (click on the MAC that you see in Winbox instead of the IP)?