Minecraft.exe is started with a path name that cannot be set in Windows Defender Firewall, so you will not be able to start a client from the launcher or log in to the multiplayer server unless you allow all the sends in the firewall settings.
Correction: The client can start, but the button is displayed as "Play Offline" instead of "Play".
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duplicates 1
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Even if the transmission of "java.exe" or "javaw.exe" is allowed, if the transmission of minecraft.exe is not allowed, the authentication fails to log in to the multiplayer server.
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We're tracking this issue in MCL-11510, so this ticket is being resolved and linked as a duplicate.
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multiplayer server is using "java.exe" or "javaw.exe" their port.
You can see it in "perfmon.exe".