Brother DCP-J125 User Manual page 121

Firewall settings (For Network users)
d
Click the New Rule.
e
Choose Port and click Next.
f
To add port enter the information below:
For network scanning

Choose UDP and enter "54925" in the Specific local ports.
Click Next.
 For Network PC-Fax
Choose UDP and enter "54926" in the Specific local ports.
Click Next.
g
Choose Allow the connection and click Next.
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