Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

security firewall tcp-strict

Configures strict checking of TCP state for all stateful rules.

set security firewall tcp-strict
delete security firewall tcp-strict
show security firewall tcp-strict

If this is not configured, then the checking of state for any TCP session is not performed in a strict manner.

tcp-strict
Enables strict TCP state checking for all sessions created.

Configuration mode


security {
    firewall {
        tcp-strict 
    }
}

Use the set form of this command to enable TCP strict tracking of stateful firewall rules for traffic associated with sessions. This command enables the user to toggle between loose or strict stateful behaviors for TCP. To do so, stateful tracking must be enabled through either a state rule or global rule.

Use the delete form of this command to disable TCP strict tracking of stateful firewall rules.

Use the show form of this command to display the configuration of TCP strict tracking of stateful firewall rules.