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Easy / TLDR:
Using stream isolation (https://www.whonix.org/wiki/Stream_Isolation) with custom ports? With port 9152?
Don’t do this anymore in Whonix 10 and above! Use any higher port numbers as per stream isolation documentation!
Long:
Reasons:
Tor Messenger will use that port in future. (https://phabricator.whonix.org/T107)
Enabling IsolateDestAddr and IsolateDestPort for it (https://trac.torproject.org/projects/tor/ticket/14382) might be recommended.
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