Open vSwitch (sometimes called OvS) is an open-source implementation of distributed virtual multilayer switch. The main role of OvS is to provide a switching stack for hardware virtualization and is slowly replacing Linux native bridge/bonds. Open vSwitch can operate as a network switch within VM Hypervisor, as well as in dedicated switching hardware control stack(also known as Software

In a day-to-day life of Network and security admins, QoS (Quality of Service) is a crucial mechanism in ordering all the data that travels through the network. QoS provides traffic prioritization as it enables a different level of importance to different applications to produce the highest level of performance possible.

QoS is based on ToS (Type of Service) or DSCP (Differentiated

A flow in networking terms is a unidirectional set of packets containing common attributes (source and destination IP, ports, protocols, etc). By using a flow protocol (e.g. NetFlow, sFlow, IPFIX), network devices can gather information about these attributes and send assembled information to your collector.

Usually, a big concern is the load on exporters (router, switch, workstation)

Untangle is a company that is renowned among SMBs, education and nonprofit organizations for its software-based applications that consist of NG firewall and SD-WAN router. Lately, Untangle has also developed Command Center, a remote cluster managed GUI. Their main product, NG Firewall, has been on the market since 2003 and it includes some really interesting features and add-ons.

NG

Barracuda is one of the most famous security companies in the world. They have started as a spam-blocking hardware device company, but soon they have diversified their portfolio which is now comprised of numerous products, including renowed CloudGen Firewall. This firewall has two types of GUI - Web and Barracuda Firewall Admin console - with myriad of options for configuration and monitoring.