Keep state – Works with all protocols.State types – pfSense® CE offers multiple options for state handling.Each state takes approximately 1 KB of RAM, so keep in mind memory usage when sizing your state table. The default state table size varies according to the RAM installed in the system, but it can be increased on the fly to your desired size. Adjustable state table size – there are multiple production pfSense® CE installations using several hundred thousand states.pfSense® CE has numerous features allowing granular control of your state table, thanks to the abilities of OpenBSD’s pf. Most firewalls lack the ability to finely control your state table. pfSense® CE is a stateful firewall, by default all rules are stateful. The firewall’s state table maintains information on your open network connections.
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