A firewall can modify a packet before passing it through or send it through unaltered. When a firewall accepts a packet from one side (the Internet), it sends the packet through to the other side (the intranet). Understanding How Firewalls WorkĪ firewall forms a physical barrier between two parts of a network, for example, the Internet and an intranet. The firewall then allows or denies transmission of individual packets across its interfaces. All packets belonging to a particular connection must go through the same firewall. Configuring Stateful Firewall Connection Remappingįirewall load balancing allows you to scale firewall protection by distributing traffic across multiple firewalls on a per-connection basis. ![]()
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