we are currently running a poc for the Client Connector on Windows (Tunnel 1.0-mode; packet filter based driver).
When ZCC is running and AnyConnect tries to reconnect, e.g., after 16hrs timeout.
AnyConnect does not reconnect due to:
Posture Assessment Failed: Hostscan CSD prelogin verification failed.
I am currenly waiting on feedback from the AnyConnect Colleagues but if someone could give me a hint, what check may fail due to ZCC, I am quite thankful.
I don’t think that it’s port 9000 is the reason. What I have seen in the past is that it disables the loopback port, not that it fails posture because of it (see link). However, given that the AnyConnect designers seen to consider a loopback listener a cause for concern, perhaps that is what is triggering a posture fail.