Brother MFC-J825DW - Manual (Page 131)

Firewall settings (For Network users)
122
7
d
Click 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.