mcjoin can be used to join IPv4 multicast groups, display
progress as multicast packets are received, and also send
multicast packets on select groups.

mcjoin can help verify intended IGMP snooping functionality
in layer-2 bridges/switches, as well as test forwarding of
multicast in static or dynamic multicast routing setups.

MGEN provides the ability to perform IP network performance tests
and measurements using TCP and UDP/IP traffic. Test messages
can be generated, received and logged. MGEN offers control over
all network parameters and timing of these messages. All this can be
done either via the command line or defined in a file format for
greater reproducibility.

msoak is a utility to simultaneously subscribe to an arbitrary
number of topics on any number of MQTT brokers and optionally
modify or normalize received payloads before printing them out.
This utility was created for being able to back up to a central
location messages received by a number of brokers; instead of
launching (and having to monitor success of) a large number of
mosquitto_sub(1) programs, msoak took on the job.

msoak uses asynchronous connects to the MQTT brokers so that it
can handle situations in which a broker may temporarily be
unavailable.

Extensible command-line interface for Netbox using the pynetbox module.

Notable Features:
* Search Netbox instance
* Filter Netbox objects
* Create and update Netbox objects with YAML file
* Shell with preloaded pynetbox endpoints
* Custom Views
* Custom Commands

A ping tool with real-time data and visualizations.

Features
* Supports concurrent Ping for multiple addresses..
* Supports visual latency display.
* Real-time display of maximum, minimum, average latency, packet
loss rate, and other metrics.
* Support IPv4 and IPv6.
* Supports concurrent pinging of n ip's under one address.
* Support output results to files.

NetPerfMeter is a network performance meter for the UDP, TCP, SCTP and DCCP transport protocols over IPv4 and IPv6. It simultaneously transmits bidirectional flows to an endpoint and measures the resulting flow bandwidths and QoS. The results are written as vector and scalar files. The vector files can e.g. be used to create plots of the results.

netsniff-ng is a high performance Linux network sniffer for packet inspection.
Basically, it is similar to tcpdump, but it doesn't need syscalls for fetching
packets. Instead, it uses an memory mapped area within kernel space for
accessing packets without the need of copying them to userspace ('zero-copy'
mechanism). It can be used for protocol analysis and reverse engineering,
network debugging, measurement of performance throughput, or network statistics
creation of incoming packets on central network nodes like routers or
firewalls.

The netsniff-ng toolkit consists of the following utilities:

* netsniff-ng, a fast zero-copy analyzer, pcap capturing and replaying tool
* trafgen, a multithreaded low-level zero-copy network packet generator
* mausezahn, high-level packet generator for HW/SW appliances with Cisco-CLI
* bpfc, a Berkeley Packet Filter compiler, Linux BPF JIT disassembler
* ifpps, a top-like kernel networking statistics tool
* flowtop, a top-like netfilter connection tracking tool
* curvetun, a lightweight curve25519-based IP tunnel
* astraceroute, an autonomous system (AS) trace route utility

ngrep strives to provide most of GNU grep's common features, applying them to the network layer.
ngrep is a pcap-aware tool that will allow you to specify extended regular or hexadecimal
expressions to match against data payloads of packets. It currently recognizes IPv4/6, TCP,
UDP, ICMPv4/6, IGMP and Raw across Ethernet, PPP, SLIP, FDDI, Token Ring and null interfaces,
and understands BPF filter logic in the same fashion as more common packet sniffing tools,
such as tcpdump and snoop.

Converts/manipulates/extracts data from a Nmap scan output.

nuttcp is a network performance measurement tool intended for use by network
and system managers. Its most basic usage is to determine the raw TCP (or UDP)
network layer throughput by transferring memory buffers from a source system
across an interconnecting network to a destination system, either transferring
data for a specified time interval, or alternatively transferring a specified
number of bytes.

This is the OwnTracks command line interface publisher, a.k.a.
ocli, a small utility which connects to gpsd and publishes position
information in OwnTracks JSON to an MQTT broker in order for
compatible software to process location data.

Omphalos is a tool for visualizing and controlling a local network (though it
will also process pcap savefiles). Captured packets are analyzed to build a
database of hosts and services. Various scans can be performed to elicit
informative packets. Spoofing and redirection at several layers allows flows
to be redirected through the host machine, or silenced. Omphalos is fully IPv6
aware, and makes use of numerous service discovery protocols.

P0f is a tool that utilizes an array of sophisticated, purely passive traffic
fingerprinting mechanisms to identify the players behind any incidental TCP/IP
communications (often as little as a single normal SYN) without interfering in
any way.

A command line tool to run SQL queries directly on PCAP files, the results
can be outputted as JSON (default), formatted/compact CSV and XML.#
It also contain a very simplistic web-server in order to inspect PCAP files
remotely.
PacketQ was previously known as DNS2db but was renamed in 2011 when it was
rebuilt and could handle protocols other than DNS among other things.

Paping (pronounced pah ping) is a computer network administration utility
used to test the reachability of a host on an Internet Protocol (TCP/IP)
network and to measure the time it takes to connect to a specified port.

redfishtool is a commandline tool that implements the client side
of the Redfish RESTful API for Data Center Hardware Management.

Find all open ports fast with RustScan, then automatically
pipe them into Nmap.

Scamper is a program that is able to conduct Internet measurement
tasks to large numbers of IPv4 and IPv6 addresses, in parallel, to
fill a specified packets-per-second rate. Currently, it supports the
well-known ping and traceroute techniques, as well as MDA traceroute,
alias resolution, some parts of tbit, sting, and neighbour discovery.

Scamper can do ICMP-based Path MTU discovery. scamper starts with the
outgoing interface's MTU and discovers the location of Path MTU
bottlenecks. scamper performs a PMTUD search when an ICMP
fragmentation required message is not returned to establish the PMTU
to the next point in the network, followed by a TTL limited search to
infer where the failure appears to occur.

ser2net provides a way for a user to connect from a network connection to a
serial port. It provides all the serial port setup, a configuration file to
configure the ports, a control login for modifying port parameters,
monitoring ports, and controlling ports.

The sethdlc utility is used to set physical interface, clock rate,
used HDLC mode, and can add any required PVCs if using Frame Relay.

https://www.kernel.org/doc/Documentation/networking/generic-hdlc.txt

Simple multicast Server/Client application.
Supports:

* IPv4 AND IPv6
* Multicast Server
* Multicast client
* Source Specific Multicast client