Lcs_150 @ Lcs_150 @lemmy.world Posts 0Comments 2Joined 2 yr. ago
Lcs_150 @ Lcs_150 @lemmy.world
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Quick comment to give you a place to start searching; This is called a stateful firewall. Any modern firewall is stateful and tracks connections in a table. When it receives external traffic (packets) associated with a known established TCP connection, it allows that traffic through.