Type 2 – Connection Gateways Sample Clauses

Type 2 – Connection Gateways. Also known as a circuit gateway, it is very similar to a packet filtering gateway, but it allows for some dynamic port opening based on limited application level knowledge. This limited knowledge is often referred to as being H.323 aware. This is a better solution than a packet filtering firewall, but it is not without its own challenges. The connection gateway must disassemble the control packets to understand which UDP ports to open dynamically. So in short, the firewall must disassemble the control packets, interpret them correctly, and implement the port openings as needed. This is not as easy as it sounds, and can lead to interoperability issues. For instance; a firewall supports only H.323 version 1 and 2, but the endpoint uses H.323 version 3.
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