dnstracer determines where a given Domain Name Server (DNS) gets its information from, and follows the chain of DNS servers back to the servers which know the data.

Dante is a SOCKS client and server implementation. It can be installed on a machine with access to an external TCP/IP network and will allow all other machines, without direct access to that network, to be relayed through the machine the Dante server is running on. The external network will never see any machines other than the one Dante is running on.

Blueman is a Bluetooth management utility using the Bluez D-Bus backend. It is designed to be easy to use for most common Bluetooth tasks.

Zyre provides reliable group messaging over local area networks using zeromq. It has these key characteristics:

• Zyre needs no administration or configuration.

• Peers may join and leave the network at any time.

• Peers talk to each other without any central brokers or servers.

• Peers can talk directly to each other.

• Peers can join groups, and then talk to groups.

• Zyre is reliable, and loses no messages even when the network is heavily loaded.

• Zyre is fast and has low latency, requiring no consensus protocols.

• Zyre is designed for WiFi networks, yet also works well on Ethernet networks.

BIRD is an Internet routing daemon with full support for all the major routing protocols. It allows redistribution between protocols with a powerful route filtering syntax and an easy-to-use configuration interface.

IFStatus is a simple, easy-to-use program for displaying commonly needed/wanted real-time traffic statistics of multiple network interfaces, with a simple and efficient view on the command line. It is intended as a substitute for the PPPStatus and EthStatus projects.

ethtool can be used to query and change settings such as speed, auto-negotiation and checksum offload on many network devices, especially Ethernet devices.

VDE is a set of programs to provide virtual software-defined Ethernet network interface controllers across multiple virtual or physical, local or remote devices. The VDE architecture provides virtual counterparts to hardware components such as switches and cables.

lcsync is a tool to sync files over IPv6 multicast or the local filesystem. It splits the file into blocks, hashes them, and compares them in order to efficiently transfer a minimal amount of data.

fping is a ping-like program which uses ICMP echo requests to determine if a target host is responding.

fping differs from ping in that you can specify any number of targets on the command line, or specify a file containing the lists of targets to ping. Instead of sending to one target until it times out or replies, fping will send out a ping packet and move on to the next target in a round-robin fashion.

Hashcash is a proof-of-work algorithm, which has been used as a denial-of-service countermeasure technique in a number of systems.

A hashcash stamp constitutes a proof-of-work which takes a parametrizable amount of work to compute for the sender. The recipient can verify received hashcash stamps efficiently.

This package contains a command-line tool for computing and verifying hashcash stamps.

NNG project is a rewrite of the scalability protocols library known as libnanomsg, and adds significant new capabilities, while retaining compatibility with the original. It is a lightweight, broker-less library, offering a simple API to solve common recurring messaging problems, such as publish/subscribe, RPC-style request/reply, or service discovery.

Asio is a cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach.

knockd is a port-knock daemon. It listens to all traffic on an ethernet or PPP interface, looking for special "knock" sequences of port-hits (UDP/TCP packets sent to a server port). This port need not be open, since knockd listens at the link-layer level.

ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range. By giving a second netmask, you can design subnets and supernets. It is also intended to be a teaching tool and presents the subnetting results as easy-to-understand binary values.

Libproxy handles the details of HTTP/HTTPS proxy configuration for applications across all scenarios. Applications using libproxy only have to specify which proxy to use.

The IP class allows a comfortable parsing and handling for most notations in use for IPv4 and IPv6 addresses and networks.

Nload is a console application which monitors network traffic and bandwidth usage in real time. It visualizes the in- and outgoing traffic using two graphs, and provides additional info like total amount of transferred data and min/max network usage.

This package provides the NBD (Network Block Devices) client and server. It allows you to use remote block devices over a TCP/IP network.

This package provides a daemon that snitches on programs making outbound connections. OpenSnitch is an application-level firewall that gives you granular control over outbound network connections on your system. It monitors application activity and prompts you to allow or deny connections on a per-application basis whenever a new outbound connection is attempted.

With this package you can monitor and filter incoming requests for network services. It includes a library which may be used by daemons to transparently check connection attempts against an access control list.

This package contains a variety of tools for dealing with network configuration, troubleshooting, or servers. Utilities included are:

arping

Ping hosts using ARP.

clockdiff

Compute time difference between network hosts using ICMP TSTAMP messages.

ninfod

Daemon that responds to IPv6 Node Information Queries.

ping

Use ICMP ECHO messages to measure round-trip delays and packet loss across network paths.

rarpd

Answer RARP requests from clients.

rdisc

Populate network routing tables with information from the ICMP router discovery protocol.

tftpd

Trivial file transfer protocol server.

tracepath

Trace network path to an IPv4 or IPv6 address and discover MTU along the way.

pproxy is an asynchronuous proxy server implemented with Python 3 asyncio. Among the supported protocols are HTTP, SOCKS and SSH, and it can use both TCP and UDP as transport mechanisms.

LibCamera is a complex camera support library for GNU+Linux, Android, and ChromeOS.