Screened host
Screened host: A host protected from external threats by a screening router to prevent unauthorized access and safeguard sensitive information. Examples include a server, database, or web application situated behind a screening router.
Screened subnet architecture
Screened subnet architecture: A network configuration that uses firewalls to create a “demilitarized zone” (DMZ), a separate subnet for public-facing servers. In this setup, one firewall sits between the internal network and the DMZ, and another firewall sits between the DMZ and the external network (e.g., the internet). This configuration allows public traffic to access […]
Screening routers
Screening routers: Network devices that filter packets to control access and manage traffic between different parts of a network. They are configured with specific rules to block or allow traffic based on factors such as source and destination IP addresses, ports, or protocols. The goal of a screening router is to enhance network security by […]
Secure communications
Secure communications: The use of cryptographic techniques to protect the confidentiality, integrity, and authenticity of communication between two or more parties. It is used to prevent unauthorized access to sensitive information and to protect against man-in-the-middle attacks. Examples include using encryption to protect the contents of an email, using digital signatures to verify the authenticity […]
Secure FTP (SFTP)
Secure FTP (SFTP): A secure protocol for transferring files over a network, ensuring the confidentiality and integrity of the transferred files and preventing unauthorized access to sensitive information. Examples include transferring sensitive documents between two parties, financial data between a client and a server, and software updates to a network of devices.
Secure Hypertext Transfer Protocol (S-HTTP)
Secure Hypertext Transfer Protocol (S-HTTP): S-HTTP was an extension of HTTP to support the secure exchange of data over the internet. However, it has not been widely adopted, and its use has been largely superseded by HTTPS, which combines HTTP with the SSL/TLS protocol to provide a secure browsing experience.