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 ТАО

link 24.08.2006 7:49 
Subject: stateful
Build-in stateful firewall.Помогите, плиз.

 Скай

link 24.08.2006 7:51 
Lingvo Computer:
stateful object объект, кумулятивно изменяющий параметры своего состояния в процессе исполнения по вызовам клиентов

 ТАО

link 24.08.2006 7:53 
а как одним словом-то сказать stateful?

 ammi

link 24.08.2006 8:26 
Одним словом это так и будет:

встроенный stateful firewall

imho
с проверкой соединений/пакетов до их обработки

см.

http://forum.ixbt.com/topic.cgi?id=14:34550-2

The basic principle behind stateful filtering is simple. When the initial packet makes the connection on the firewall, the packet filter will create an entry in its state table for that connection. All subsequent packets that belong to the connection for which an entry in the state table exist will be let through without matching them against the whole ruleset. State tables are checked before the filter begins evaluating filtering rules.

The packet filter decides if a packet belongs to a connection for which a state exists by checking the packet's sequence number stored in the TCP header. When the sequence number falls out of a narrow window, the packet is dropped. This mechanism prevents spoofed packet injection into an established connection.

 

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