@misc{25151,
  author = {Shirley Radack},
  title = {Protecting Information Systems with Firewalls: Revised Guidelines on Firewall Technologies and Policies},
  year = {2009},
  month = {2009-10-29},
  publisher = {ITL Bulletin, National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904197},
  language = {en},
}