The official Samsung driver (universal linux driver ULD) does not support access to the printer/scanner functionality via LAN. Seems, this driver supporting devices attached via USB.
For LAN access, just the Open Source Samsung Universal Linux Driver (SULD) is working for me (project page at http://www.bchemnet.com/suldr/index.html).
If you intend to install the SULD, you will need to perform the following steps (sudo-permissions are required on your host):
Install the packages libsane-extras, and xsane
sudo apt-get intall libsane-extras sudo apt-get intall xsane
Install the SULD driver following the instructions from project http://www.bchemnet.com/suldr/index.html
The following steps must be performed, namely adding the SULD repository to your resource list, add the signature-key to your truststore, update the local database, and finally the installation of the suld-driver.
sudo bash -c 'echo "deb http://www.bchemnet.com/suldr/ debian extra" >> /etc/apt/sources.list' wget http://www.bchemnet.com/suldr/pool/debian/extra/su/suldr-keyring_2_all.deb sudo dpkg -i suldr-keyring_2_all.deb rm -f suldr-keyring_2_all.deb sudo apt-get update sudo apt-get install suld-driver-4.01.17
Now add your user $USER to both groups “scanner” and “lp” (will require logout or reboot)
sudo usermod -a -G scanner $USER sudo usermod -a -G lp $USER
After reboot and login, the tool “xsane” should discover the scanner, and you should be able to choose the printer in setup-tool.