Hi, I have just confiuged HA as a networking layman an I think my guide will be better....just saying. I will post it via support once I have it in final draft

https://docs.sophos.com/nsg/sophos-firewall/19.0/Help/en-us/webhelp/onlinehelp/HighAvailablityStartupGuide/HAConfiguration/HARuntimeConfiguration/index.html#monitoring-ports Please describe the intended HA behavior (active-passive) if there are no monitored…

Problem: While configure the Primary Device in HA (active-passiv) you will get the non descritive Error "HA could not be enabled" if the HA Link is not up or the Peer Device is not reachable. What To Do: - Verify HA Interface Link is UP and Peer…

https://support.sophos.com/support/s/article/KB-000042455 Please add the following at "What To Do" - Check HA Interface if Link Status is up after enabling HA, otherwise check Cabling (Swap RX/TX on direct fiber connection between devices)

Hey! This article is totally senseless. The initial device role of the auxiliary device has to be configured as auxiliary, not as primary!