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Glossary

3DES
  • Also known as: Triple DES

Symmetric-key block cipher used in data encryption that applies the Data Encryption Standard (DES) cipher algorithm three times to each data block.

802.11n

Wireless networking standard that uses multiple antennas to increase data rates. 

802.1q VLAN

IEEE 802.1Q is a standard for virtual LANs (VLANs) on an Ethernet network that defines VLAN tagging for Ethernet frames and frame handling for bridges and switches, and contains provisions for a quality of service prioritization scheme (IEEE 802.1p). It also defines the Generic Attribute Registration Protocol.

add-in

Software utility that can be used in conjunction with a device or service; for example, Barracuda Outlook Add-In.

add-on

A piece of software that enhances another software application and usually cannot be run independently.

Advanced Persistent Threat
  • Also known as: APT

Malicious cyber attacks directed at a specific target, usually over a long period of time. APTs are often run by professional organizations, looking to steal information rather than just money.

Advanced Threat Protection
  • Also known as: ATD, ATP, Advanced Threat Detection, BATP, Barracuda Advanced Threat Protection

Service that analyzes inbound email attachments with most MIME types in a separate, secured cloud environment, detecting new threats and determining whether to block such messages. Formerly known as Advanced Threat Detection, or ATD.

AMI
  • Also known as: Amazon Machine Image

AWS template that contains configuration, application server, and applications required to launch an EC2 AWS Instance.

Android

Mobile device operating system. Compare to Apple iOS.

anti-evasion

Protection against network attacks that combine several different known evasion methods to create a new technique that is delivered over several layers of the network simultaneously. 

anti-malware
  • Also known as: malware protection

Protection against malicious software, used to disrupt computer or mobile operations, gather sensitive information, gain access to private computer systems, or display unwanted advertising.

anti-obfuscation

Protection against attacks that involve obfuscated code. Obfuscation may involve encrypting code, stripping out potentially revealing metadata, renaming useful class and variable names, or adding meaningless code to an application binary. 

antivirus

Antivirus software, abbreviated: AV. Used to prevent, detect and remove malicious software.

API
  • Also known as: Application Programming Interface

 A set of tools and procedures provided by the programmer of an application so that other programmers can control, exchange data with, or extend the functionality of an application.

APN
  • Also known as: Access Point Name

Access Point Name provided by an ISP for wireless WAN connections.

Apple iOS

Apple mobile operating system for devices such as iPhone and iPad. Compare to Android.

appliance

Device or piece of equipment.

Application Load Balancer

AWS feature that makes routing decisions at the application layer (HTTP/S), supports path-based routing, and can route requests to one or more ports on each EC2 instance or container instance in a VPC.

ARP
  • Also known as: Address Resolution Protocol

Protocol for mapping IP addresses to physical addresses such as Ethernet or Token Ring.

ARP spoofing
  • Also known as: ARP trashing, spoofing

Type of attack in which a malicious actor sends falsified ARP (Address Resolution Protocol) messages over a local area network. This results in the linking of an attacker's MAC address with the IP address of a legitimate computer or server on the network.

ASCII

Referring to a standard 7-bit character system that includes the alphanumeric characters and printer control codes.

authoritative DNS

Name server that gives answers in response to queries about names in a DNS zone.

authority zone

Associated with DNS. A section of the domain-name tree for which one name server is the authority.

Auto Scaling Group

A representation of multiple EC2 instances that share similar characteristics, and that are treated as a logical grouping for the purposes of instance scaling and management.

autonomous system
  • Also known as: AS

Collection of networks under a common administration sharing a common routing strategy. Autonomous systems are subdivided by areas. An autonomous system must be assigned a unique 16-bit number by the IANA. 

AWS Direct Connect
  • Also known as: Amazon Web Services

Enables you to use the Internet privately through AWS cloud services by linking your internal network to an AWS Direct Connect location. You can create virtual interfaces directly to the AWS cloud and to Amazon VPC, bypassing Internet service providers in your network path.

AWS IoT
  • Also known as: Amazon Web Services Internet of Things

A managed cloud platform that lets connected devices easily and securely interact with cloud applications and other devices.

AWS region

A named set of AWS resources in the same geographical area. A region comprises at least two Availability Zones.

AWS Management Console

A simple and intuitive web-based user interface to access and manage AWS.

Azure Active Directory
  • Also known as: Azure AD

A fully managed multi-tenant service from Microsoft that offers identity and access capabilities for applications running in Microsoft Azure and for applications running in an on-premises environment.

back-end server

Part of the back-end process, that usually consists of server, application, and database. The back end is where the technical processes happen, as opposed to the front end, which is usually where the user's interaction occurs.

backbone

Referring to the Internet, a central network that provides a pathway for other networks to communicate.

Balance-XOR

Operating mode for Ethernet bundles where the link is chosen by calculating the hash out of the source/destination MAC (Layer 2) combined with the IP addresses (Level 3).

bandwidth

Rate of data transfer, usually expressed in multiples of bits per second (bps).

Barracuda Anti-Fraud Intelligence

Barracuda anti-phishing detection which uses a special Bayesian database for detecting phishing scams.

Barracuda Campus

Online documentation and training material for all Barracuda Networks products, located at campus.barracuda.com. Contains feature descriptions, how-to articles, and release notes. Formerly known as Barracuda University and Barracuda TechLibrary.

Barracuda Central

Provides a wide range of statistics, threat information, and a number of useful services to help manage and secure your network. Shares information with Barracuda Networks customers and the Internet security community. 

Barracuda cloud

A complementary component of all Barracuda Networks products, providing an added layer of protection and scalability.

Barracuda Cloud Control
  • Also known as: BCC

A comprehensive cloud-based service that enables administrators to monitor and configure multiple Barracuda Networks products from a single console.

Barracuda Email Threat Scanner for Office 365

Tool to discover security and compliance threats that reside in your Microsoft Office 365 account.

Barracuda Essentials for Office 365

Helps organizations prepare, migrate, and operate faster, safer, and more efficiently in Office 365. Barracuda Essentials provides critical multi-layer security, archiving, and backup for Office 365.

Barracuda Networks account

Credentialed account used to log into Barracuda Services and Barracuda Appliance Control.

Barracuda Networks Technical Support

Contact Barracuda Networks Technical Support if you need help with your Barracuda Networks product. Visit https://www.barracuda.com/support/index for details.

Barracuda NextGen Firewall X-Series

Application-aware network firewall appliance, designed for organizations without dedicated IT personnel to manage firewalls.

Barracuda NG Web Security Gateway (IBM ISS)

Web Security Gateway engine used by the URL Filter service on the Barracuda NextGen Firewall F-Series. The Barracuda NG Web Security Filter can only be used in combination with the HTTP proxy and is not compatible with Application Control. Requires a Barracuda NG Web Security Gateway subscription.

Barracuda portal

Entry point into Barracuda cloud services.

Barracuda Real-Time System
  • Also known as: BRTS, Barracuda Real-Time Protection, BRTP

Advanced service to detect zero-hour spam and virus outbreaks even where traditional heuristics and signatures to detect such messages do not yet exist.

Barracuda Reputation

A database maintained by Barracuda Central and includes a list of IP addresses of known, good senders as well as known spammers, or IP addresses with a poor reputation.

Barracuda Reputation Block List
  • Also known as: BRBL

Database of IP addresses manually verified to be noted sources of spam.

Bayesian analysis

A statistical procedure that estimates parameters of an underlying distribution based on the observed distribution.

BIND
  • Also known as: Berkeley Internet Name Domain

The standard TCP/IP naming service that links network names with IP addresses.

block device

Storage device that moves data in sequences of bytes or bits (blocks). Example: hard disk, CD-ROM drive, flash drive.

block device mapping

Defines the block devices (instance store volumes and EBS volumes) to attach to an AWS instance. 

blocklist
  • Also known as: blacklist, block list, black list

List of domains, users, or hosts that are denied access, especially refers to mail and web traffic. Sometimes known as blacklist. Compare to allow list or whitelist.

Blowfish

Licence-free symmetric encryption algorithm that can be used as a replacement for the DES and IDEA algorithms.

byte-level data deduplication

Data deduplication method that analyzes data streams at the byte level by performing a byte-by-byte comparison of new data streams versus previously stored ones.

CAST

Licence-free symmetric encryption algorithm (key block cipher).

certificate

A document or seal certifying the authenticity of something. A digital certificate certifies the ownership of a public key. This allows relying parties to rely upon signatures or on assertions made about the private key that corresponds to the certified public key.

changelog

Log of configuration changes on the appliance. Can be found in the release notes of the product.

checksum

The result of a mathematical operation that uses the binary representation of a group of data as its basis, usually to check the integrity of the data.

Class A|B|C|D network

Classes of IP addresses as defined in the Internet Protocol hierarchy.

classic load balancer

In AWS, a Classic Load Balancer makes routing decisions at either the transport layer (TCP/SSL) or the application layer (HTTP/HTTPS), and supports either EC2-Classic or a VPC (virtual private cloud).

cloud integration

AWS cloud integration allows the firewall to connect directly to the AWS service fabric to rewrite routes in AWS route tables and to retrieve information for the cloud element on the dashboard. Cloud integration also works with Azure.

cloud operating system

A computer operating system that is specially designed to run in a provider's datacenter and be delivered to the user over the Internet or another network. Windows Azure is an example of a cloud operating system or 'cloud layer' that runs on Windows Server 2008.

cloud portability

The ability to move applications and data from one cloud provider to another. This is the opposite of "vendor lock-in".

cloud replication
  • Also known as: site to cloud replication, site-to-cloud replication, Site to Cloud Replication

Replicates backup data to the Barracuda Cloud, ensuring against data loss in case of a catastrophe.

cloud storage

A model of data storage where the digital data is stored in logical pools, the physical storage spans multiple servers (and often locations), and the physical environment is typically owned and managed by a hosting company.

cloud-based encryption

A service offered by cloud storage providers whereby data is transformed using encryption algorithms and is then placed on a storage cloud.

CloudFormation

AWS management tool that lets you create, manage, and update a collection of AWS resources using templates and allowing Json code for template deployment.

CloudFront

An AWS content delivery service that helps you improve the performance, reliability, and availability of your websites and applications.

Cloudscan scoring

A cloud-based spam scanning engine which assigns a score to each message processed ranging from 0 (definitely not spam) to 10 (definitely spam).

cloudsourcing

Replacing traditional IT operations with lower-cost, outsourced cloud services.

CloudWatch

AWS management tool to monitor resources and applications. Aggregates data and metrics (cpu load, network throughput, disk io, etc), filters it, and provides alarm actions.

cluster-specific

Global settings that apply to a cluster on a Barracuda NextGen Control Center.

collision domain

In Ethernet, the network area within which frames that have collided are propagated. Repeaters and hubs propagate collisions. LAN switches, bridges and routers do not.

congestion

Traffic in excess of network capacity.

connection draining
  • Also known as: Amazon Web Services

AWS feature, lets you scale down EC2 instances to reduce sessions.

CPU emulation

Masks the virtualization environment, so payload can be detonated more effectively.

cross region replication

Feature of S3 storage class in AWS. Once enabled, every object uploaded to a particular S3 bucket is automatically replicated to a designated destination bucket located in a different AWS region.

cybersquatting

Registering or using an Internet domain name, based on a name that is not yours, intending to profit from the owner of the name.

dashboard

Main page of many Barracuda Networks 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 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.

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).

deduplication
  • Also known as: intelligent compression, single-instance storage

​Method of removing redundancies from data before transmission.

dictionary attack

A technique for defeating a cipher or authentication mechanism by trying to determine its decryption key or passphrase by systematically entering every word in the dictionary.

DKIM
  • Also known as: DomainKeys Identified Mail

An email authentication method designed to detect email spoofing. It enables an email recipient to check that an email claimed to have come from a specific domain was indeed authorized by the owner of that domain. This protocol attempts to prevent the use of forged sender addresses in emails, a technique often used in phishing and email spam. 

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.

DNS reputation filtering

Filtering mail traffic based on a DNS reputation database. Used by the Spam Filter service (blacklist, DNSBL).

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.

DomainKeys Identified Mail
  • Also known as: DKIM

Email authentication method designed to detect email spoofing.

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.

edge location

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

eDiscovery
  • Also known as: electronic discovery, e-discovery

The legal procedure of discovery - finding data with the intent to use it as evidence in a legal case - as it pertains to information and evidence in electronic form.

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.

email continuity

Email failover system that allows email communication to continue during mail server outage.

email encryption

Encrypting email messages to prevent their content by being read by anyone other than the intended recipient.

Energize Updates

Provides Barracuda Networks 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.

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.

external blocklist services
  • Also known as: RBLs, DNSBLs

Lists of IP addresses from which potential spam originates.

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.

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.

fuzzy search

A simple search query that uses approximate string matching (fuzzy matching) to correct for typographical errors and misspellings.

Gb

A gigabit, or 10^9 bits.

GB 

A gigabyte, or 10^9 bytes, or 8000 million bits.

GHz
  • Also known as: gigahertz

A unit of frequency equal to 10^9 hertz, which is defined as one cycle per second.

Google Accounts Enforcement

Integration of Google Accounts, for example in authentication processes.

Google App Engine

A service that enables developers to create and run web applications on Google's infrastructure and share their applications via a pay-as-you-go, consumption-based plan with no setup costs or recurring fees.

H.323

Standard that defines the protocols to provide audio-visual communication sessions on any packet network. H.323 addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multi-point conferences.

hardware refresh

Barracuda program that allows existing appliance customers with an active Energize Updates subscription to migrate to the latest hardware platforms at a reduced price -- ensuring customers benefit from the latest hardware improvements and firmware capabilities.

HIPAA

The Health Insurance Portability and Accountability Act of 1996, gives patients in the US rights over their health information and sets rules and limits on who can look at and receive health information. The Privacy Rule applies to all forms of individuals' protected health information, whether electronic, written, or oral. The Security Rule is a Federal law that requires security for health information in electronic form. For details, visit http://www.hhs.gov/ocr/privacy/hipaa/understanding/

hostname

Label assigned to a device connected to a computer network. Used to identify the device in various forms of electronic communication.

HTTP
  • Also known as: Hypertext Transfer Protocol

Protocol for submitting data over a network, commonly used to load website content in a web browser.

HTTPS
  • Also known as: Hypertext Transfer Protocol Secure

Consists of communication over HTTP within a connection encrypted by TLS or SSL. The main motivation is authentication of the visited website and protection of the privacy and integrity of the exchanged data.

Infrastructure Services

Infrastructure is the backbone of all of your business operations.

Intrusion Detection System

Network security feature that monitors local and forwarding firewall traffic for malicious activities.

IS
  • Also known as: intermediate system

Routing node in an OSI network.

ISDN
  • Also known as: Integrated Services Digital Network

Communication protocol offered by telephone companies that permits telephone networks to carry data, voice, and other source traffic.

jitter

Measure of the difference in packet delay, that is, the difference in the space between packet arrival times. Jitter can be remedied somewhat with a jitter buffer.

journaling

A file system that keeps track of changes not yet committed to the file system’s main part by recording the intentions of such changes in a data structure known as a “journal”. In the event of a system crash or power failure, such file systems can be brought back online quicker with lower likelihood of becoming corrupted.

JSON
  • Also known as: JavaScript Object Notation

An open, text-based data exchange format (like XML), that is human-readable and platform-independent. Data formatted according to the JSON standard is lightweight and can be parsed by JavaScript implementations.

kb

A kilobit.

Launch Configuration

AWS template that an Auto Scaling group uses to launch EC2 instances. Contains AMI, instance type, key pair, security groups, and block device mapping.

Layer 7 Application Control

A legacy feature of the Barracuda NG Firewall. Barracuda Networks recommends using the new Application Control in Barracuda NextGen Firewall instead.

LDAPS
  • Also known as: LDAP over SSL, Secure LDAP

Connection protocol used between application and Network Directory or Domain Controller. LDAPS communication is encrypted and secure.

legacy

Latest maintenance release for the previous major firmware version.

Link Protection

Barracuda service that automatically rewrites a deceptive URL in an email message to a safe Barracuda URL, and delivers that message to the user.

macOS

Macintosh Operating System. Formerly known as Mac OS X.

mail server

A server that receives, stores, sends, and processes emails.

malicious site

An Internet site that attempts to install malware onto your device, usually to steal your personal information or to disrupt the operation of your system.

Mb

A megabit.

MBPS

A unit of measure used to describe the rate of data transmission equal to one millions bits per second.

MHz
  • Also known as: megahertz

A unit of frequency equal to 10^6 hertz, which is defined as one cycle per second. 

Microsoft Office 365
  • Also known as: O365

Microsoft's software plus services model that offers Microsoft Office on a subscription-based pricing model, with cloud storage abilities.

Microsoft SharePoint

A web application platform in the Microsoft Office server suite, mainly used for document management and storage. 

MIME type

Two-part identifier for file formats and format contents transmitted over the Internet.

MOS
  • Also known as: Mean Opinion Score

Measure representing the overall quality of a system or stimulus, calculated by taking the arithmetic mean of individual values of quality. Often used for, but not limited to, video, audio and audiovisual quality.

multi-factor authentication
  • Also known as: multifactor authentication, MFA

Security feature that requires at least two forms of authentication to access a destination or service. 

multilayer switch

Switch that filters and forwards packets based on MAC addresses and network addresses. A subset of LAN switch.

multiplexing

Scheme that allows multiple logical signals to be transmitted simultaneously across a single physical channel.

multitenancy
  • Also known as: multitenant

The existence of multiple clients sharing resources (services or applications) on distinct physical hardware. Due to the on-demand nature of cloud, most services are multitenant.

MX records
  • Also known as: mail exchange record

Resource record in DNS that specifies a mail server responsible for accepting email messages for a recipient’s domain. Includes a preference value to prioritize mail delivery when there are multiple mail servers.

NAT instance

A NAT device, configured by a user, that performs network address translation in a VPC public subnet to secure inbound Internet traffic.

NDR
  • Also known as: non-delivery report, bounce, non-delivery notification (NDN)

An automated email message from the mail system informing the sender that there was a delivery problem with an email message that they sent.

NetBIOS
  • Also known as: Network Basic Input/Output System

API used by applications on an IBM LAN to request services from lower-level network processes. These services might include session establishment and termination, and information transfer.

network layer

Layer 3 of the OSI reference model. This layer provides connectivity and path selection between two end systems. The network layer is the layer at which routing occurs.

non-stub area

Resource-intensive OSPF area that carries a default route, static routes, intra-area routes, interarea routes, and external routes. The only OSPF areas that can have virtual links configured across them and that can contain an ASBR.

NoSQL

Nonrelational database systems that are highly available, scalable, and optimized for high performance. Instead of the relational model, NoSQL databases (like Amazon DynamoDB) use alternate models for data management, such as key–value pairs or document storage.

null ciphers

Form of encryption where the plaintext is mixed with a large amount of non-cipher material.

offline authentication

Authentication method with an internal IP address as destination. Offline Authentication Works with all protocols (for example, POP3).

offsite

Refers to a location other than the subject site. Example: Barracuda Cloud Storage subscription plans provide diverse offsite storage that scales to meet your changing data requirements.

offsite vaulting
  • Also known as: off-site vaulting

The ability to store longer-term backups exclusively in the cloud to free space for daily needs.

On-Demand Instance

An Amazon EC2 pricing option that charges you for compute capacity by the hour with no long-term commitment.

ONC-RPC
  • Also known as: Open Network Computing Remote Procedure Call

Remote procedure call system based on calling conventions used in Unix and the C programming language.

onsite

At the place where a business or activity happens. Compare to offsite.

OpenStack

A free and open-source cloud computing software platform used to control pools of processing, storage, and networking resources in a datacenter.

OSB transformation

Orthogonal sparse bigram transformation. In machine learning, a transformation that aids in text string analysis and that is an alternative to the n-gram transformation. OSB transformations are generated by sliding the window of size n words over the text, and outputting every pair of words that includes the first word in the window.

outbound filtering

Scanning email messages from local users before any potentially harmful messages can be delivered to others on the Internet.

OWA
  • Also known as: Outlook Web Access, Outlook Web App

Microsoft provides OWA as part of Exchange Server to allow users to connect to their email accounts via a web browser, without requiring the installation of Microsoft Outlook.

PaaS
  • Also known as: platform as a service

Cloud platform services, where the computing platform (operating system and associated services) is delivered as a service over the Internet by the provider.

packet fragmentation

Part of the processing of TCP IP traffic that consists of fragmenting, sending, and reassembling packets.

padding

Additional, meaningless data adds to a packet to increase its size.

PAYG

peer

A device to which a computer has a network connection that is relatively symmetrical and where both devices can initiate or respond to a similar set of requests.

persistent storage

A data storage solution where the data remains intact until it is deleted.

Personal Firewall

Component of the Barracuda Network Access Client. Centrally managed host firewall that can handle up to four different rulesets at once, depending on the policy applicable to user, machine, date, and time

phishing
  • Also known as: phishing attack

Attempt to obtain sensitive information such as usernames, passwords, and credit card details (and, indirectly, money), often for malicious reasons, by disguising as a trustworthy entity in an electronic communication. See also spear phishing.

Placement Group

Logical grouping of AWS instances within a single Availability Zone.

policy routing

Also called source-based routing, is used when the source IP address of the connection determines, in part or completely, which route is used.

policy simulator

A tool in the IAM AWS Management Console that helps you test and troubleshoot policies so you can see their effects in real-world scenarios.

polling

A means of Media Access Control where a device may only transmit information when it is given permission to transmit by a controller device.

polymorphic threat

A threat that appears differently to threat detection systems, but is functionally the same. An advanced threat that signatures alone cannot detect.

PPTP
  • Also known as: Point-to-Point Tunneling Protocol

A network protocol that is used to establish VPN tunnels.

predictive sender profiling

A method of blocking spammers who obfuscate their web identities.

Premium Support

24/7 support, offered by Barracuda Networks

private subnet

A VPC subnet whose instances cannot be reached from the Internet.

PST file
  • Also known as: personal storage table

An Outlook Data File. Used for POP3, IMAP, and web-based mail accounts. When you want to create archives or back up your Outlook folders and items on your computer, such as Exchange accounts, you must create and use additional PST files. See also OST file.

public cloud

Cloud computing model, in which a service provider makes resources, such as applications and storage, available to the general public over the Internet. Examples include Amazon AWS, Google Cloud Platform, and  Microsoft Azure.

public subnet

A subnet whose instances can be reached from the Internet.

purging
  • Also known as: purge

Cleaning out inactive or obsolete records or data from the set of active files for archiving or deletion.

quarantine

Isolating a file suspected of being infected with a virus to a specific area of a system to prevent it from infecting other files.

ransomware

Malicious software designed to block access to computer files or an entire system until a sum of money is paid.

RDS

AWS term, managed Relational Database Service

real time
  • Also known as: realtime, real-time

The time in which an action is performed.

regular expression

A combination of characters or character classes and operators that describe text for matching purposes.

replication

Involves sharing information to ensure consistency between sources. By comparison, backups save data unchanged for a long period of time; replicas undergo frequent updates.

Reserved Instance

A pricing option for EC2 instances that discounts the on-demand usage charge for instances that meet the specified parameters. Customers pay for the entire term of the instance, regardless of how they use it.

Reserved IP addresses
  • Also known as: RIP

IP addresses reserved for special purposes. For example, IP addresses reserved and assigned to Azure cloud services.

retention policy

Rules that determine whether data older than a defined age will be deleted of offloaded to another device or cloud.

reverse lookup zone

Support the secondary function of Domain Name System (DNS) - the resolution of IP addresses to host names.

reverse proxy

The HTTP Proxy directs incoming requests from other servers to clients without providing the origin details.

RMA
  • Also known as: Routing Information Protocol

Numbered authorization provided by a merchant, like Barracuda Networks, to permit the return of a product.

role-based administration
  • Also known as: role based administration

Gives administrators the ability to assign specific privileges to users and to present the user with only the tools and permissions necessary to perform specific tasks, based on their role within the organization.

rollback

A return to a previous state after an installation or configuration failure.

root certificate

A CA-signed or self-signed public key certificate that identifies the root certificate authority (CA).

Route 53

AWS service for DNS-based load balancing that connects user requests to EC2 instances, ELBs, S3 buckets, and Internet applications and provides health checks for monitoring or to route traffic to healthy endpoints.

route table

In AWS, a set of routing rules that controls the traffic leaving any subnet that is associated with the route table. You can associate multiple subnets with a single route table, but a subnet can be associated with only one route table at a time.

routed bridging

Bridging mode where the router acts as a bridge.

RPC protocols
  • Also known as: Rate Control Protocol, ONC-RPC, DCE-RPC

Congestion control algorithm designed for fast download times such as user response times, or flow-completion times. 

RRS

One of the four storage classes in AWS. 99.9& SLA reduced redundancy storage, lower fault tolerance, stored in 1 region.

ruleset

A collection of one or more access or application rules.

SafeSearch

Feature of Google Search that acts as an automated filter of pornography and potentially offensive content.

Salesforce

An online SaaS company that is best known for delivering customer relationship management (CRM) software to companies over the Internet.

scalability

The suitability of a network system to operate properly and efficiently when configured on a large scale.

SCCP
  • Also known as: Signalling Connection Control Part, Skinny

Network layer protocol that provides extended routing, flow control, segmentation, connection orientation, and error correction facilities in Signaling System 7 telecommunications networks.

SD-WAN
  • Also known as: software-defined networking in a wide area network, software-defined WAN

A wide area network controlled by software. Control and data are decoupled, simplifying both network hardware and management.

serial port

A port on a computing device that is capable of either transmitting or receiving one bit at a time. 

service certificate

Certificate for a service, signed by a valid, trusted entity, that allows access without further validation. 

session layer

The layer in the OSI 7-Layer Model that is concerned with managing the resources required for the session between two computers.

single pass

Algorithm that reads its input exactly once, in order, without unbounded buffering. Generally requires O(n) time and less than O(n) storage (typically O), where n is the size of the input.

Single Sign-On
  • Also known as: SSO

A session and user authentication service that permits a user to use one set of login credentials to access multiple applications. 

SIP

Communications protocol for signaling and controlling multimedia communication session such as voice and video calls.

Site-to-Site VPN

Securely connects entire networks to each other, for example, connecting a branch office network to a company headquarters network.

SLA
  • Also known as: service level agreement, service-level agreement

A contractual agreement by which a service provider defines the level of service, responsibilities, priorities, and guarantees regarding availability, performance, and other aspects of the service.

smart host

Email message transfer agent that allows a Simple Mail Transfer Protocol (SMTP) server to route email to an intermediate mailserver rather than directly to the recipient's server.

SMS Passcode

Multi-Factor Authentication (MFA) solution that adds an extra security layer for a broad range of authentication clients.

SNA
  • Also known as: Systems Network Architecture

IBM's communications architecture and strategy.

snapshot

Capture of the state of a system at a particular point in time.

SNMP service

The SNMP service is used to remotely monitor the network and system state of a Barracuda NextGen Firewall using a network management system (NMS).

SNS
  • Also known as: simple notification service

Feature to push notifications to mobile services and trigger actions, in Amazon Web Services (AWS).

SNTP
  • Also known as: Simple Network Time Protocol

Network package format for time synchronization, similar to NTP, only recommended for simple applications.

Source NAT

Changing the source address/port in the IP header of a packet. Example: changing a private IP address/port into a public address/port in the IP header of a packet leaving the network.

spam

Unwanted email messages, usually for advertising purposes and usually sent in bulk.

spear phishing
  • Also known as: spearphishing

A form of phishing that is more targeted. The sender of the fraudulent phishing email knows something about the intended victim, making it more likely that they will divulge personal information, like birth dates and passwords.

SPF
  • Also known as: Sender Policy Framework

A protocol enabling the owner of an Internet domain to specify which computers are authorized to send mail with envelope-from addresses from their own domain. 

SPF record
  • Also known as: Sender Policy Framework record

Type of DNS record that identifies which mail servers are permitted to send email on behalf of your domain.

spooling
  • Also known as: Simultaneous Peripheral Operations Online

Putting jobs in a buffer, a special area in memory, or on a disk where a device can access them when the device is ready. Spooling is useful because devices access data at different rates. The buffer provides a waiting station where data can rest while the slower device catches up.

Spot Instance

Purchasing option that allows a customer to purchase unused Amazon EC2 computer capacity at a highly-reduced rate.

SQS
  • Also known as: Amazon Simple Queue Service, Amazon SQS

Amazon Simple Queue Service (SQS) is a fast, reliable, scalable, fully managed message queuing service.

SSL VPN client

VPN client that can be installed on the Barracuda CloudGen Firewall and then accessed through the Barracuda SSL VPN web portal. (Barracuda SSL VPN is a different product.)

static website hosting

Hosting of a static website in Amazon S3. When a bucket is enabled for Static website hosting, all content is accessible to web browsers via the Amazon S3 website endpoint of the bucket.

stream and packet compression

Data compression technique used in wireless networks.

subnetting

Partitioning of an IP address space into several smaller address spaces.

syslog streaming

Method for handling of log file messages that are to be transferred to another system for analyzing purposes.

tap

An intrusion into a network cable by a connector.

TCP Proxy

The TCP Proxy is placed between browser and web server and filters requests and responses in TCP streams.

TCP/IP
  • Also known as: Transmission Control Protocol/Internet Protocol

A Transport and Network Layer Protocol, respectively, used for communication in the Internet and often in private networks.

Telnet

A protocol to access a remote computer system, often a Unix system, over the network. Origin: Teletype Network.

terminal server

Communications processor that connects asynchronous devices such as terminals, printers, hosts, and modems to any LAN or WAN that uses TCP/IP, X.25, or LAT protocols.

TFTP
  • Also known as: Trivial File Transfer Protocol

A simplified version of FTP (file tranfer protocol).

timestamp
  • Also known as: time stamp

A date/time string to mark an occurrence of an event. 

top level domain
  • Also known as: TLD

The last part of a hostname.

transparent proxy
  • Also known as: inline proxy

The HTTP Proxy operates transparently to the clients in the network.

Transport Layer Security
  • Also known as: TLS

Cryptographic protocol that provides communications security over a computer network.

typosquatting
  • Also known as: URL hijacking

A form of cybersquatting which relies on mistakes, such as typographical errors, made by Internet users when typing a website address into a web browser. The URL the user visits usually has malicious intent

typosquatting protection

Barracuda feature that checks for common typos in the URL domain name and, if found, rewrites the URL to the correct domain name so that the user visits the intended website.

unencrypt

To decrypt encrypted data. The antonym of encrypt.

unit

Product or system.

User Identity Awareness

Security term for traffic monitoring based on username, host, and IP address.

vertical cloud

A cloud computing environment optimized for use and built around the compliance needs of specialized industries such as healthcare, financial services, and government operations.

virtualization

Allows multiple guest virtual machines (VM) to run on a host operating system. Guest VMs can run on one or more levels above the host hardware, depending on the type of virtualization.

Vx

Specifies virtual model of a Barracuda Networks products. For example, Barracuda Web Application Firewall 460 Vx.

web interface
  • Also known as: Web UI

Web-based user interface.

web server

A computer system that processes requests via HTTP, the basic network protocol used to distribute information on the web.

Wi-Fi

A technology for wireless local area networking with devices based on the IEEE 802.11 standards. 

YAML

A human-readable data serialization language, commonly used for configuration files.

zero-day
  • Also known as: zero day attack

Vulnerability exploited by hackers before it is known to the vendor.