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Barracuda Web Application Firewall

Glossary

dashboard

Main page of many Barracuda product interfaces, providing a summary of the system. Formerly known as the Status tab.

data center

A facility used to house computer systems and associated components, such as telecommunications and storage systems.

Data Loss Prevention
  • Also known as: DLP, Data Leak Prevention

Email filter using pre-defined patterns such as credit card number, social security number, driver's license or HIPAA medical terms, to block, quarantine or encrypt outbound messages.

data truncation
  • Also known as: truncate

Occurs when data or a data stream is stored in a location too short to hold its entire length. May occur automatically, such as when a long string is written to a smaller buffer, or deliberately, when only a portion of the data is wanted.

datasheet

Document that summarizes the performance and other technical characteristics of a product, machine, component (e.g., an electronic component), material, a subsystem (e.g., a power supply) or software in sufficient detail to be used by a design engineer to integrate the component into a system.

DCE-RPC
  • Also known as: Distributed Computing Environment Remote Procedure Call

Remote procedure call system that allows programmers to write distributed software without having to worry about the underlying network code.

DDoS
  • Also known as: Distributed Denial of Service

A Distributed Denial of Service is a cyber-attack where the perpetrator seeks to make a machine or network resource unavailable to users by temporarily or indefinitely disrupting services of a host connected to the Internet, using more than one, often thousands of, unique IP addresses.

dedicated host

An Internet hosting option where an organization leases an entire server, fully dedicated to their use. This is also an option in the public cloud. The price for a Dedicated Host varies by instance family, region, and payment option.

dedicated instance

Amazon EC2 instance that runs on single-tenant hardware dedicated to a single customer.

dedicated reserved instance

An option you can purchase from a cloud vendor to guarantee that sufficient capacity will be available to launch Dedicated Instances into a virtual private cloud (VPC).

defacement

An attack on a website that changes the visual appearance of the site or a web page.

demilitarized zone
  • Also known as: DMZ

A physical or logical sub-network that contains and exposes an organization’s external-facing services to a larger and untrusted network, usually the Internet. The purpose of a DMZ is to add an additional layer of security to an organization’s local area network (LAN). An external network node has direct access only to equipment in the DMZ, rather than to any other part of the network.

destination NAT

Changing the destination address/port in the IP header of a packet. Example: redirecting incoming packets with a destination of a public address/port to a private IP address/port inside the network.

digital signature

A mathematical scheme for demonstrating the authenticity of a digital message or document.

DNS
  • Also known as: Domain Name System

Distributed database that translates domain names, like www.example.com, into unique IP address.

DNS Cache
  • Also known as: DNS resolver cache

A temporary database, maintained by a computer's operating system, that contains records of all recent visits and attempted visits to websites and other Internet domains.

DNS record

Database record used to map a URL to an IP address.

Docker

Open-source software that automates the deployment of applications inside virtualized software containers.

Docker image

A layered file system template that is the basis of a Docker container. Docker images can comprise specific operating systems or applications.

DoS attack
  • Also known as: Denial of Service attack, spoofing

A  cyber-attack where the perpetrator seeks to make a computer or network resource unavailable to users by temporarily or indefinitely disrupting services of a host connected to the Internet. Denial of Service attacks are typically accomplished by flooding the target with superfluous requests in an attempt to overload systems and prevent legitimate requests from being fulfilled. See also Distributed Denial of Service or DDoS.

dynamic path selection

Term used in context with Traffic Intelligence (TI). Using dynamic path selection, the session is balanced depending on the amount of traffic.

dynamic routing

Routing that adjusts automatically to network topology or traffic changes. Also called adaptive routing.

DynamoDB

A fully managed Amazon NoSQL database service that provides fast and predictable performance with seamless scalability.

EBS
  • Also known as: Amazon Elastic Block Store

Provides persistent block level storage volumes for use with Amazon EC2 instances in the AWS Cloud. Instances that use Amazon EBS for the root device automatically have an Amazon EBS volume attached.

EC2
  • Also known as: Amazon Elastic Compute Cloud

Forms a central part of AWS by allowing users to rent virtual computers on which to run their own computer applications.

edge location

Used by the AWS service CloudFront. Feature that offers content to end users via geographically closer locations to improve their experience.

EGP
  • Also known as: Exterior Gateway Protocol

Internet protocol for exchanging routing information between autonomous systems. 

Elastic Beanstalk

A web service for deploying and managing applications in the AWS cloud without worrying about the infrastructure that runs those applications.

elastic computing

The ability to dynamically provision and deprovision computing and storage resources to stretch to the demands of peak usage, without the need to worry about capacity planning and engineering around uneven usage patterns.

Elastic IP address

A static public IP address that belongs to an AWS account. Can be associated with an instance to make it accessible from the Internet. The Elastic IP is natted/mapped by AWS to the private IP.

elastic load balancer

AWS web service that improves an application's availability by distributing incoming traffic between two or more EC2 instances.

encrypt

To convert information or data into a cipher or code, especially to prevent unauthorized access. Antonym: unencrypt. 

Energize Updates

Provides Barracuda products with protection from the latest Internet threats. These updates are sent out hourly, or more frequently if needed, to ensure that appliances always have the latest and most comprehensive protection. Barracuda Energize Updates subscriptions must be purchased with any Barracuda Networks appliance. Includes basic support, firmware maintenance, security updates, and early release firmware.

envelope encryption

The use of a master key and a data key to algorithmically protect data. The master key is used to encrypt and decrypt the data key and the data key is used to encrypt and decrypt the data itself.

Ethernet

Local area network technology that uses special twisted pair or fiber optical cables. As per the OSI model, Ethernet provides services up to and including the data link layer.

EULA

Contract between the Barracuda and the purchaser, establishing the purchaser's right to use Barracuda software.

evasion

Bypassing an information security device in order to deliver an exploit, attack, or other form of malware to a target network or system, without detection.

exception profiling

Technique of working with generated log files to refine security settings, customizing them to the web application.See also adaptive profiling.

exploit

The use of software, data, or commands to 'exploit' a weakness in a computer system or program to carry out some form of malicious intent, such as a denial-of-service attack, Trojan horses, worms, or viruses.

false positive

A result that indicates a given condition is present, when it is not.

firmware

Model version of a Barracuda product.

flooding

A Denial of Service (DoS) attack that is designed to bring a network or service down by flooding it with large amounts of traffic.

Flow Logs

AWS service that enables you to capture information about the IP traffic going to and from network interfaces in a VPC.

forensics

Techniques of examining digital media with the aim of identifying, preserving, recovering, analyzing, and presenting facts and opinions about the digital information.

forward proxy

An intermediary for requests from clients under an administrator's control to areas that are not under the administrator's control. Sometimes called "proxy" without the word "forward".

front end

The front end is responsible for collecting input in various forms from the user.

front-end server

The front-end server is an extension of the back-end server and is designed to provide scalability.

FTP
  • Also known as: File Transfer Protocol

Standard network protocol used to transfer files between a client and server on a computer network.

FTP proxy

Allows the proxy to control FTP traffic. When a client uploads or downloads files, the proxy identifies the traffic as FTP, allowing the appliance to control file transfers using TCP optimization and caching.

FTPS

Extension to FTP that adds support for the Transport Layer Security (TLS) and the Secure Sockets Layer (SSL) cryptographic protocols.

full duplex

A communication system between two entities in which either entity can transmit simultaneously. Compare to half duplex.