Brother MFC-9125CN Software User's Manual page 118

Firewall settings (For Network users)
f
To add a 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.
h
Check the applicable items and click Next.
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