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An application-level gateway (ALG) is a security component that augments a firewall or NAT and supports address and port translation for certain application layer protocols. Learn about the functions, examples and implementations of ALGs in Windows, Linux and other networks.
NAT traversal is a technique of establishing and maintaining Internet Protocol connections across gateways that implement network address translation (NAT). UPnP Internet Gateway Device Protocol (UPnP IGD) is one of the methods that allows a device on a network to ask the router to open a port.
Network address translation (NAT) is a method of mapping an IP address space into another by modifying network address information in the IP header of packets. Learn about the history, types, methods and applications of NAT, and how it relates to IPv4 address exhaustion.
A router and firewall distribution is an operating system designed for use as routers and/or firewalls. This list includes various Linux, FreeBSD and other distributions, with their status, type, architecture, license, cost and description.
Learn about the history, types, and implementations of application firewalls, which control input/output or system calls of an application or service. Compare network-based and host-based application firewalls, and see examples of products and software for various platforms.
A circuit-level gateway is a type of firewall that works at the session layer of the OSI model or the TCP/IP stack. It monitors TCP handshaking and conceals the details of the protected network from external traffic.
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1747 Olentangy River Rd, Columbus, OH · Directions · (614) 299-9425