mDNS reflector is on for both networks. I also have a rule to allow inbound traffic from the LAN to the printer. I can ping the printer and also access its web interface. Unfortunately, most of the time the printer is not available when I try to AirPrint. Strangely enough, if I reboot the printer, it shows up again and prints just fine, for a few minutes it at least. But after a while it stops working again (until I reboot the printer again). Perhaps the printer is going into sleep mode and stops advertising itself, and meanwhile the cached entry in the mDNS reflector expires. Completely wild guess though, I honestly have no clue what's going on.
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