• Bookmarks

    Bookmarks

  • Concepts

    Concepts

  • Activity

    Activity

  • Courses

    Courses


Firewall traversal refers to the techniques used to allow data to pass through a firewall that would otherwise block it, often to enable communication between devices across different networks. This is crucial for applications like VoIP, video conferencing, and remote access, where direct communication between endpoints is necessary despite the presence of network security barriers.
Network Address Translation (NAT) is a method used in networks to modify network address information in IP packet headers while in transit, allowing multiple devices on a local network to share a single public IP address. This process enhances security and conserves the limited number of available IPv4 addresses by hiding the internal IP addresses from external networks.
Session Traversal Utilities for NAT (STUN) is a protocol that allows devices behind a Network Address Translator (NAT) to discover their public IP address and the type of NAT they are behind, facilitating peer-to-peer communication. It is widely used in Voice over IP (VoIP), messaging, and other real-time communications to establish a direct connection between clients without requiring a relay server.
Traversal Using Relays around NAT (TURN) is a protocol that enables devices behind Network Address Translation (NAT) to receive incoming data over the Internet by using a relay server. It is essential for real-time communication applications where direct peer-to-peer connectivity is obstructed by NAT configurations, ensuring reliable data transmission paths.
Hole punching is a network communication technique used to establish a direct connection between two devices behind NAT (Network Address Translation) by leveraging a third-party server to facilitate the initial connection. This method is crucial for peer-to-peer applications, enabling efficient data transfer without requiring direct public IP addresses.
Port forwarding is a networking technique that allows external devices to access services on a private network by redirecting communication requests from one address and port number to another. It's crucial for enabling remote access to networked devices and services, often used in gaming, hosting servers, and accessing home security systems remotely.
Application Layer Gateways (ALGs) are specialized gateways that facilitate communication between different networks by translating application layer protocols. They ensure security and compatibility by inspecting, modifying, and forwarding traffic based on the application-level data being transmitted.
Proxy servers act as intermediaries between a client and a server, facilitating requests and responses while offering benefits like anonymity, security, and load balancing. They are crucial in network management, providing controlled access to resources and improving performance by caching content and filtering traffic.
A Virtual Private Network (VPN) is a technology that creates a secure and encrypted connection over a less secure network, such as the internet. It enhances privacy and security by masking the user's IP address and encrypting data transmitted between the user and the VPN server.
Security policies are formalized rules and guidelines that dictate how an organization manages, protects, and distributes its sensitive information and resources. They serve as a framework for ensuring compliance with laws and regulations, while also mitigating risks associated with security breaches and data loss.
Deep Packet Inspection (DPI) is a form of network packet filtering that examines the data part (and sometimes the header) of a packet as it passes an inspection point, searching for protocol non-compliance, viruses, spam, intrusions, or other defined criteria to decide whether the packet can pass or if it needs to be routed to a different destination. It is a powerful tool for network management and security, enabling advanced monitoring and control over data traffic, but it also raises significant privacy concerns due to its ability to inspect the content of communications.
Traversal Using Relays around NAT (TURN) is a protocol that facilitates the traversal of network address translators (NATs) or firewalls for multimedia applications by using a relay server to relay data between peers. This approach is especially useful in scenarios where direct peer-to-peer connectivity is not possible due to restrictive NAT or firewall configurations.
UDP Hole Punching is a technique used to establish a direct connection between two devices behind different NATs without requiring port forwarding, enabling peer-to-peer communication. It works by coordinating the exchange of packets through a third-party server to create a mapping in each NAT, allowing direct data transfer between the peers.
NAT traversal is a technique used to establish and maintain Internet protocol connections across gateways that implement Network Address Translation (NAT). It is crucial for peer-to-peer applications and services that require direct end-to-end connectivity, such as VoIP and online gaming, to function properly in network environments with NAT devices.
Concept
Cone NAT (Network Address Translation) is a type of NAT where a single external IP address and port pair is mapped to a single internal IP address and port, allowing inbound packets from any external host to reach the internal host as long as they match the external IP and port. This makes Cone NAT particularly useful for applications requiring consistent and predictable connections, such as peer-to-peer communication and gaming.
3