Why is Windows Firewall blocking my printer?
Firewalls monitor network traffic and can block network connections for some software and hardware. Windows 10 includes its own Windows Defender Firewall which may block Brother printers and other models for some users. Therefore, affected users cannot use their Brother printers when they are blocked by firewalls. 1. Turn Off the Windows 10 Firewall 2. Set Up Inbound Rules for Brother Printer Ports