Brother DCP-J140W - Manual (Page 94)

Firewall settings (For Network users)
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4
b
When the User Account Control screen appears, do one of the following:
 Users who have administrator rights: Click Continue.
 For users who do not have administrator rights: Enter the administrator password and click OK.
c Make sure that Windows Firewall on the General tab is set to On.
d Choose the Exceptions tab.
e
Click Add port.