Brother MFC-J6510DW Software User's Manual page 115

Firewall settings (For Network users)
d
Choose the Exceptions tab.
e
Click Add port...
f
To add port 54925 for network scanning, enter the information below:
1 In Name: Enter any description, for example "Brother Scanner".
2 In Port number: Enter "54925".
3 Make sure UDP is selected.
Then, click OK.
g
Click Add port...
h
To add port 54926 for Network PC-Fax, enter the information below:
1 In Name: Enter any description, for example "Brother PC-Fax".
2 In Port number: Enter "54926".
3 Make sure UDP is selected.
Then, click OK.
i
Make sure that the new setting is added and is checked, and then click OK.
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