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Barracuda Email Security Gateway

Glossary

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
  • Also known as: pkt

A unit of data routed between an origin and a destination over a network.

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.

POP
  • Also known as: Post Office Protocol

A protocol used to retrieve email from a mail server.

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.

provisioning

Process of preparing and equipping a network or device to allow it to provide services to its users.

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 DNS

Public Domain Name System (DNS) resolution service.

public key

A value provided by a designated authority as an encryption key.  Public key cryptography (asymmetric cryptography) uses pairs of keys: public keys that may be distributed widely, and private keys that are known only to the owner.

public subnet

A subnet whose instances can be reached from the Internet.

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.

RADIUS
  • Also known as: Remote Authentication Dial-In User Service, WiFi Access Point Authentication

Networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA or Triple A) management for users who connect and use a network service.

RAID
  • Also known as: redundant array of independent disks

Provides a way of storing the same data in different places (redundantly) on multiple hard disks.

range-specific
  • Also known as: range specific

1. Relating to a set range of values.

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

RBL
  • Also known as: Realtime Blackhole List

List of IP addresses whose owners do not stop the proliferation of spam. The owners often have customers who are associated with creating or relaying the spam. 

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).

Round-Robin policy

Method of traffic balancing among links/interfaces in circular order.

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.