Glossary

Next-hop route to a network that cannot be directly accessed. Example: default route (0.0.0.0/0), that forwards packets not belonging to a the directly attached network to the remote gateway provided by the ISP. 

A gigabit, or 10^9 bits.

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

With generic forwarding, requests from networks are forwarded without any firewall intervention even if the firewall is switched off.

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

Integration of Google Accounts, for example in authentication processes.

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.

Selecting specific sets of data to back up and configure multiple schedules for each data source, each with a different set of selected data.

Generic Routing Encapsulation is a tunneling protocol developed by Cisco that can encapsulate a wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-point link to Cisco routers at remote points over an IP internetwork. 

A collection of settings that define what a system will look like and how it will behave for a defined group of users.

The Barracuda CloudGen Firewall VPN Graphical Tunnel Interface (GTI) Editor displays VPN site-to-site tunnels on a graphical interface.

Feature that lets you set up a confirmation page or ticketing system to temporarily grant guests access to the network.

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.

A communication system between two entities in which data transmission occurs in only one direction at a time between a sending station and a receiving station. Compare to full duplex.

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.

Deployment method that ensures that the services running on the system are always available even if one system is down due to maintenance or a hardware fault.

A specific construction for calculating a message authentication code (MAC) involving a cryptographic hash function in combination with a secret key. 

A unit of measure used to express the number or routers that a packet must pass through its way to its destination.

The firewall service responsible for governing traffic to and from local services running on the Barracuda CloudGen Firewall F-Series and Barracuda Firewall Control Center. 

A collection of resource record sets that Amazon Route 53 hosts. Like a traditional DNS zone file, a hosted zone represents a collection of records that are managed together under a single domain name.

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

Network objects on the Barracuda CloudGen Firewall where the IP addresses are determined by DNS resolution.

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

Service on the Barracuda CloudGen Firewall that acts as an intermediary for HTTP and HTTPS requests from network clients. The HTTP Proxy can cache and scan web traffic.

HTTP header field that identifies the address of the webpage (i.e., the URI or IRI) that links to the resource being requested. (Originally a misspelling of referrer.) 

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.

Network architecture that uses a central connecting point.

Hardware Virtual Machine (HVM) virtualization allows the guest VM to run as though it is on a native hardware platform, except that it still uses paravirtual (PV) network and storage drivers for improved performance.

The combination of a public cloud provider (such as AWS) with a private cloud platform. The public and private cloud infrastructures operate independently of each other, and integrate using software and processes that allow for the portability of data and applications.

Internetwork made up of more than one type of network technology, including LANs and WANs.

Native Hypervisor on Windows, created by Microsoft.

Computer software, firmware, or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a "host machine". Each virtual machine is called a "guest machine".

Cloud infrastructure services in which a virtualized environment is delivered as a service by the cloud provider.

The Identity and Access Management feature of cloud services (like AWS)  that lets you control who can use the provider's services and resources (authentication) and what resources they can use in which ways (authorization).

The Internet Assigned Numbers Authority organization delegates authority for IP address-space allocation and domain-name assignment to the NIC and other organizations and maintains a database of assigned protocol identifiers used in the TCP/IP stack, including autonomous system numbers.

Internet protocol used to exchange routing information within an autonomous system. Examples of common Internet IGPs include IGRP, OSPF, and RIP.

Internet Key Exchange protocol, used to set up a security association (SA) in the IPsec protocol suite.

Infrastructure is the backbone of all of your business operations.

Authentication method that intercepts unauthorized users HTTP or HTTPS connections and redirects them to a login page, for example, on the Barracuda NextGen Firewall. After successful authentication the user is forwarded to the original destination.

A "copy" of a virtual appliance/image/machine that is being installed, brought up, configured, etc. In the context of an AWS deployment, a virtual product (for example, a Barracuda CloudGen Firewall) that runs on Amazon Web Services (AWS).

With an Instant Replacement subscription, if your Barracuda Networks product fails, we will ship you a replacement unit within one business day so you can get back up and running soon. Instant Replacement subscriptions also work toward getting updated hardware through the Hardware Refresh program.

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

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

Performance measurement of input/output operations per second, used to characterize computer storage devices like hard disk drives (HDD), solid state drives (SSD), and storage area networks (SAN).

Devices that can now intercommunicate with each other and the Internet.

A numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication.

Standard for exchange of network monitoring information. Feature that enables the Barracuda NextGen Firewall to stream log data to IPFIX collectors. 

A framework of open standards for protecting communications over Internet Protocol (IP) networks.

The fourth and sixth versions, respectively, of the Internet Protocol (IP). Following are examples of notation for each type of address:IPv4    192.0.2.235IPv6    2001:0db8:0000:0042:0000:8a2e:0370:7334

Routing node in an OSI network.

Protocol defined by RFC 2408 for establishing Security Associations (SA) and cryptographic keys in an Internet environment. It is part of IKE.

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

Organization that provides access to the Internet.