nachdem ich mich ziemlich verstiegen hab, hat mir dieser Link sehr geholfen:

You can also disable filtering entirely from the command line with a 'pfctl -d'.  Alternately, we leave the loaded ruleset in /tmp/rules.debug, feel free to edit it to fix your connectivity issue and reload with pfctl -f /tmp/rules.debug, then do whatever work you need to do in the UI to make the fix permanent.

und noch dieser Link