What are firewalls ?

A firewall is a network security device (hardware or software based) that monitors incoming and outgoing network traffic and automatically decides whether to allow or block specific traffic based on a predefined set of security rules.

Firewalls are the first line of defense in network security for over 25 years. Their role is to establish a barrier between secured and controlled internal networks that can be trusted and untrusted outside networks, such as the Internet.

A firewall can be hardware, software, or both.

Firewall are an essential part of secure networks see secure networks.

Unified threat management (UTM) firewall

a UTM is a stateful inspection firewall allows or blocks traffic based on state, port, and protocol. It monitors all activity from the opening of a connection until it is closed. Filtering decisions are made based on both administrator-defined rules as well as context, which refers to using information from previous connections and packets belonging to the same connection.

It also features intrusion prevention and antivirus. It may also include additional services and often cloud management. UTMs focus on simplicity and ease of use.

Next-generation firewall (NGFW)

Firewalls have evolved beyond simple packet filtering and stateful inspection. iwebhost helps your company deploy next-generation firewalls to block modern threats such as advanced malware and application-layer attacks.

A next-generation firewall has the following features:

  • Standard firewall capabilities like stateful inspection
  • Integrated intrusion prevention
  • Application awareness and control to see and block risky apps
  • Upgrade paths to include future information feeds
  • Techniques to address evolving security threats

While these capabilities are increasingly becoming the standard for most firewalls, however NGFWs can do more.