Screening router From Wikipedia the free encyclopedia 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.[1] See also[edit] Access Control List DMZ References[edit] ^ John E. Canavan (1 January 2001). Fundamentals of Network Security. Artech House. p. 217. ISBN 978-1-58053-176-4. This computer networking article is a stub. You can help Wikipedia by expanding it.vte