Linux Printer:
You will need two packages from the Brother website. The lpr and the CUPS .deb files. Install the lpr package first. After installing both, restart cupsd. The Printers dialog should now show the printer. You may want to confirm the IP settings and print a test page.
Ignore the instructions to edit /etc/printcap.This file is auto generated and it makes no sense to edit it.
The installable .deb packages can be downloaded from http://support.brother.com/g/b/downloadlist.aspx?c=us&lang=en&prod=hll2380dw_us_as&os=128. As of today the current version 3.2.0-1 dated 2015-02-12.
Linux Scanner:
Instructions
This can be summarized as:
brsaneconfig4 -a name=(name your device) model=HL-L2380DW ip=xx.xx.xx.xx
Once installed the scanner should show up in simple-scan or xsane.
Note the links on the instruction page does not point to the latest driver and the instructions on the download page do not mention network scanning.
The driver and brsaneconfig4 can be downloaded from http://support.brother.com/g/b/downloadlist.aspx?c=us&lang=en&prod=hll2380dw_us_as&os=128. As of today the current version is 0.4.3-1 dated 2015-05-19.