olemus
tulemüüri vahend, mis jälgib aktiivsete ühenduste olekut
ja kasutab seda teavet
pakettide läbi tulemüüri lubamise otsustamiseks:
seansiteabe (IP-aadressid, pordinumbrid) arvestamine
võimaldab tugevdada turvet
=
a firewall facility that can monitor the state of active connections and use this information to determine which network packets to allow through the firewall

ülevaateid
https://image.slidesharecdn.com/6af273bc-c326-4160-b966-dede8dc9bfc3-160609070248/95/firewalls-11-638.jpg

http://uniforumchicago.org/slides/price/sld018.htm

https://image.slidesharecdn.com/6af273bc-c326-4160-b966-dede8dc9bfc3-160609070248/95/firewalls-12-638.jpg

https://security.stackexchange.com/questions/165560/circuit-level-gateway-vs-dynamic-packet-filter

https://www.youtube.com/watch?v=XC96BbJZ0hg

http://www.cs.columbia.edu/~nahum/w6998/lectures/vpk-columbia-nsdi-pf.pdf

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

vt ka
- olekufiltriga tulemüür