Translations:Brother networked printer/163/en
From Gentoo Wiki
Some of Brother scanners are supported by media-gfx/sane-airscan package. This is an open source "universal vendor-neutral" driver and allows accessing IPP scanners via either of eSCL or WSD protocol. See the homepage of the package for list of scanners which were reported to work. Scope of feature support (e.g. resolution) depends on set of IPP attributes published by the scanner.