All prerequisites met successfully, the upgrade went well until the very end when this message appeared:

Checking Orion Service Manager, all services are running except Syslog - which is stuck in "stopping" and trap, which is stopped and won't start.
New firewall ports --- are they TCP or UDP, the NPM 12.0 Release Notes *does not specify* - could this be a problem with the site and services simply not starting?
Thanks,
Bill