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2. Virtual firewall - Wikipedia

   en.wikipedia.org/wiki/Virtual_firewall

   One method to secure, log and monitor VM-to-VM traffic involved routing the virtualized network traffic out of the virtual network and onto the physical network via VLANs, and hence into a physical firewall already present to provide security and compliance services for the physical network.

3. Explicit Congestion Notification - Wikipedia

   en.wikipedia.org/wiki/Explicit_Congestion...

   ECN allows end-to-end notification of network congestion without dropping packets. ECN is an optional feature that may be used between two ECN-enabled endpoints when the underlying network infrastructure also supports it. Conventionally, TCP/IP networks signal congestion by dropping packets.

4. Iftop - Wikipedia

   en.wikipedia.org/wiki/Iftop

   Iftop is a free software command-line system monitor tool developed by Paul Warren. It produces a real-time stream of incoming and outgoing network communications from the operating system iftop is running within. [2] By default, the connections are ordered by bandwidth usage, with only the largest ("top") bandwidth consumers shown.

5. pfSense - Wikipedia

   en.wikipedia.org/wiki/PfSense

   pfSense is a firewall/router computer software distribution based on FreeBSD. The open source pfSense Community Edition (CE) and pfSense Plus is installed on a physical computer or a virtual machine to make a dedicated firewall/router for a network. [ 3 ]

6. List of router and firewall distributions - Wikipedia

   en.wikipedia.org/wiki/List_of_router_and...

   FreeBSD derivative, fork of pfSense: x86-64: FreeBSD License: Free or paid: Forward caching proxy, traffic shaping, intrusion detection, two-factor authentication, IPsec and OpenVPN [1] pfSense: Active: FreeBSD derivative, fork of m0n0wall: x86-64, ARM: Closed & Open source licenses: Free as PfSense CE or paid on Netgate Devices as PfSense Plus

7. Deep packet inspection - Wikipedia

   en.wikipedia.org/wiki/Deep_packet_inspection

   The Chinese government uses deep packet inspection to monitor and censor network traffic and content that it claims is harmful to Chinese citizens or state interests. This material includes pornography, information on religion, and political dissent. [25] Chinese network ISPs use DPI to see if there is any sensitive keyword going through their ...

8. Comparison of firewalls - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_firewalls

   pfSense: Apache 2.0 / Proprietary (Plus) Free / Paid FreeBSD-based appliance firewall distribution Zeroshell: 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 ...

9. Network tap - Wikipedia

   en.wikipedia.org/wiki/Network_tap

   A network tap is a system that monitors events on a local network. A tap is typically a dedicated hardware device, which provides a way to access the data flowing across a computer network. The network tap has (at least) three ports: an A port, a B port, and a monitor port. A tap inserted between A and B passes all traffic (send and receive ...