olemus
dünaamilise paketifiltriga tulemüür, jälgib vahendatavate võrguühenduste olekut ning erinevalt olekufiltrita tulemüürist analüüsib ka paketi sisu, et tuvastada paketid, mis kuuluvad algatatud ühendusse ning avada ja sulgeda selle liikluse jaoks vajalikke porte
= a dynamic packet filtering firewall that monitors the state of the network connections being mediated and, unlike a stateless inspection firewall, also analyses the contents of the packet to identify packets belonging to the initiated connection, and to open and close the ports necessary for this traffic

ülevaateid
https://en.wikipedia.org/wiki/Stateful_firewall

http://www.informit.com/articles/article.aspx?p=31945&seqNum=3

https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=901083

https://securitylab.disi.unitn.it/lib/exe/fetch.php?media=teaching:netsec:2016:reports:t10:stateful_firewall-final-report.pdf

vt ka
- olekufiltrita tulemüür
- pakettide dünaamiline filtreerimine
- pakettide lahkamine