what's the detail procedure of processing packets by firewall
Asked by
Gavin Tian
hi, everyone,
would you like to help me ?
I want to know what's the details structure of linux firewall and details of how it classifies packets. I search internet for a long time but only find some things about how to add and delete rules for firewall, not firewall structure discussed.
As far as I know, a firewall can be stateful firewall, consisting of stateful tables which are to use store the syn packets. when the ack packets come back, this ack packet will be checked by the rules of stateful tables. If it satisfies those rules, then ack packets can pass the firewall, and the connection will be estimated. or ack will be discarded.
I wonder whether the linux firewall also works in this way and I want the details.
Thanks very much !
Question information
- Language:
- English Edit question
- Status:
- Solved
- For:
- Ubuntu iptables Edit question
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- Solved by:
- Eliah Kagan
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