The Enterprise Session Border Controller (ESBC) is a Device Commonly used in VoI

Posted by Ajinkya on April 5th, 2021

An Enterprise Session Border Controller, also known as a Session Initiation Protocol (SIP) controller or gatekeeper is an application feature of a typical IP networking system. It controls the session initiation communication by accepting, detecting, and responding to requests for services. It establishes security and authentication on the internet. The term is widely used in the software industry to refer to any entity that controls or manages the Enterprise Session Border Controller within an IP network.

An Enterprise Session Border Controller is used to authenticate users' authorization to a server and to establish security parameters in the network. When a user calls an Enterprise Session Border Controller-enabled phone number, the number is forwarded to the IP host where it is converted to a meaningful character string, then passed on to the caller. In response, the host sends back an appropriate message, usually in the form of an ICMP destination unreachable packet. These packets can be captured, converted into content, and analyzed by application programs.

An IP session initiator uses this information to authenticate a user's identity. It controls whether or not the session can continue, and, if so, how. The session may be initiated by a server (a computer terminal or other device used for session initiation) or by clients (another computer that desires to initiate a session). Either way, it begins with a session key, which serves as a security function. This session key prevents unauthorized access to the server or other IP-based resources.

Enterprise Session Border Controller is employed in various protocols that use IP networks as their transport mechanisms. The most common example of this is the ICMP Echo Request (ping) protocol, which generates a broadcast request, which is then received by the other computer. The receiver then analyzes the packet, converts it into IP-formatted content, and decodes it back into the original format before returning it to the sender. This method, while highly efficient, is susceptible to attacks that can manipulate the system's traffic before the information reaches the destination; these include but are not limited to, buffer overruns, hop by hop translation attacks, and collision attacks.

Enterprise Session Border Controller can be implemented using different means. Some use standard protocols like TCP/IP, while others use the IP security suite on top of IP packets. A good example of this is Java System Security, which implements the necessary functionality for controlling and monitoring IP communication. One of the most widely-used standards for IP security is the Secure Socket Layer, or SSL, which controls and manages all data transfers between clients and servers and facilitates secure data encryption.

Another type of Enterprise Session Border Controller is the Shared IP Session Border Controller. With Shared IP, a single IP address is used for multiple connections, each of which has its own firewall within the system itself. This provides for much greater security, as every IP address within the system has a unique identifier and can be controlled by a different IP.


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