screening router

A screening router performs packet-filtering and is used as a firewall. In some cases a screening router may be used as perimeter protection for the internal network or as the entire firewall solution.{{cite book|author=John E. Canavan|title=Fundamentals of Network Security|url=https://books.google.com/books?id=bSPsPmtSMboC&pg=PA217|date=1 January 2001|publisher=Artech House|isbn=978-1-58053-176-4|pages=217}}