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A next-generation firewall (NGFW) is a part of the third generation of firewall technology, combining a conventional firewall with other network device filtering functions, such as an application firewall using in-line deep packet inspection (DPI) and an intrusion prevention system (IPS).
Apache 2.0 / Proprietary (Plus) Free / Paid FreeBSD-based appliance firewall distribution Zeroshell (Discontinued) GPL: Free / Paid Linux/NanoBSD-based appliance firewall distribution SmoothWall: GPL: Free / Paid Linux-based appliance embedded firewall distribution IPFire: GPL: Free (Donations welcomed) Linux-based appliance embedded firewall ...
A stateful firewall keeps track of the state of network connections, such as TCP streams, UDP datagrams, and ICMP messages, and can apply labels such as LISTEN, ESTABLISHED, or CLOSING. [2] State table entries are created for TCP streams or UDP datagrams that are allowed to communicate through the firewall in accordance with the configured ...
Deep packet inspection (DPI) is a type of data processing that inspects in detail the data being sent over a computer network, and may take actions such as alerting, blocking, re-routing, or logging it accordingly.
Intrusion prevention systems (IPS), also known as intrusion detection and prevention systems (IDPS), are network security appliances that monitor network or system activities for malicious activity. The main functions of intrusion prevention systems are to identify malicious activity, log information about this activity, report it and attempt ...
A web application firewall (WAF) is a specific form of application firewall that filters, monitors, and blocks HTTP traffic to and from a web service.By inspecting HTTP traffic, it can prevent attacks exploiting a web application's known vulnerabilities, such as SQL injection, cross-site scripting (XSS), file inclusion, and improper system configuration. [1]
Free and open-source software portal; ModSecurity, sometimes called Modsec, is an open-source web application firewall (WAF). Originally designed as a module for the Apache HTTP Server, it has evolved to provide an array of Hypertext Transfer Protocol request and response filtering capabilities along with other security features across a number of different platforms including Apache HTTP ...
Cisco's IPS 4200 Series, which worked as an intrusion prevention system (IPS). Cisco VPN 3000 Series Concentrators, which provided virtual private networking (VPN). The Cisco ASA is a unified threat management device which combines several network security functions.