After adding Firewall rules, you might have to restart router!
Note to self: If you are unable to ping again for some reason (and therefore cannot access Calibre Content Server), see if restarting the router fixes it.
If that doesn't work, reset the Windows Defender Firewall rules (Control Panel > Windows Defender Firewall > Restore defaults, or Control Panel > Windows Defender Firewall > Advanced settings > Inbound Rules, and manually remove the rules), add the rules again, then restart the router.
Unsure why this might happen (happed only once to me), but if it was working before, one of these should do the trick.
Last edited by 01100001; 09-12-2022 at 12:43 PM.
Reason: added message title
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