Minimalfirewall: Minimal Firewall is a portable Windows firewall without requiring custom kernel modifications or disabling core isolation

Blackbird: > It didn’t happen with the programs. The Windows-related issues somehow just “fixed” themselves. > > A new Portmaster was just released, and it solved all the problems. Sorry, were you talking about Minimal Firewall (MFW) or Portmaster just above? I was testing further, and I couldn’t reproduce your problem with MFW with apps that already had block rules, but realize system rules are created on their own (but if there is a separate block rule, that should take precedence).