Networking

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still a mess.

General

Hardware

Cisco

Home router

Quagga

  • Quagga is a routing software suite, providing implementations of OSPFv2, OSPFv3, RIP v1 and v2, RIPng and BGP-4 for Unix platforms, particularly FreeBSD, Linux, Solaris and NetBSD. Quagga is a fork of GNU Zebra.

Other

Software

See Comms, Security#Firewalls etc.

Linux

sudo lsof -i
  ports open

sudo netstat -plnt

ss -tnlp

sudo nmap -sT -O localhost

nc 127.0.0.1 123 < /dev/null; echo $?
  test local port, 1 for closed 0 for open

iputils

net-tools

route
  show (and temp. set) network routes avaliable. in /sbin, in root $PATH only
route -n
  show network routes available, just ip

iproute2

ip addr

etc.

Other

  advanced traceroute + ping

Configuration

Goes a little something like; 

domain members.linode.com
search members.linode.com
nameserver 98.76.54.32
nameserver 76.54.32.10
options rotate


systemd supports inetd


  • NCD - scripting language for network configuration and much more


  • Horde is linux-based networking middleware that allows an application to stripe data from multiple streams across a set of dissimilar wireless network channels. Horde's approach aims to decrease the programming costs associated with building complex mobile systems that use network striping.

nmap

nmap -A 192.168.1.1
  scan machine and report

nmap -v -A 192.168.1.1-255
  verbose scan range and report

nmap -sT -sU -O -p 1-65535 localhost
  full port scan, to check args

nmap -p T:110,955

nmap -R -sL 209.85.229.99/27 | awk ‘{if($3==”not”)print”(“$2″) no PTR”;else print$3″ is “$2}’ | grep ‘(‘

"This command uses nmap to perform reverse DNS lookups on a subnet. It produces a list of IP addresses with the corresponding PTR record for a given subnet. You can enter the subnet in CDIR notation (i.e. /24 for a Class C)). You could add “–dns-servers x.x.x.x” after the “-sL” if you need the lookups to be performed on a specific DNS server. On some installations nmap needs sudo I believe. Also I hope awk is standard on most distros."

Saving

wget

wget -O myzip.zip https://github.com/zeromq/jzmq/zipball/master

wget -m http://example.com
  --mirror
wget -mk http://example.com
  --convert-links
wget -mk -w 20 http://example.com
  with delay between requests

wget -E -H -k -K -p -nd http://example.com
  to mirror a single page
  --adjust-extension
  --span-hosts
  --convert-links
  --backup-converted
  --page-requisites
  --no-directories - httpd access permission issues. to try next time; -nH

cURL

  • curl is a tool to transfer data from or to a server, using one of the supported protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, TELNET and TFTP). The command is designed to work without user interaction. 
curl http://www.google.com/search.js -o /path/to/local/file.js

curl http://site.{one,two,three}.com

curl ftp://ftp.numericals.com/file[1-100].txt
     ftp://ftp.numericals.com/file[001-100].txt (with leading zeros)
     ftp://ftp.letters.com/file[a-z].txt
 sequences of alphanumeric series by using []

curl http://any.org/archive[1996-1999]/vol[1-4]/part{a,b,c}.html
  Nested sequences are not supported, but you can use several ones next to each other:

curl http://www.numericals.com/file[1-100:10].txt  http://www.letters.com/file[a-z:2].txt
  multiple urls + specify a step counter for the ranges to get every Nth number or letter:

other

  • mulk - Multi-connection command line tool for downloading Internet sites with image filtering and Metalink support. Similar to wget and cURL, but it manages up to 50 simultaneous and parallel links. Main features are: HTML code parsing, recursive fetching, Metalink retrieving, segmented download and image filtering by width and height. It is based on libcurl, liburiparser, libtidy, libmetalink and libcrypto.
  • aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, BitTorrent and Metalink. aria2 can be manipulated via built-in JSON-RPC and XML-RPC interfaces.
  • HTTrack allows you to download a World Wide Web site from the Internet to a local directory, building recursively all directories, getting HTML, images, and other files from the server to your computer. HTTrack arranges the original site's relative link-structure. Simply open a page of the "mirrored" website in your browser, and you can browse the site from link to link, as if you were viewing it online. HTTrack can also update an existing mirrored site, and resume interrupted downloads.
httrack "https://example.com" -O ExampleMirrorDirectory \
"-*" \
"+https://example.com/images/*" \
"-*.swf"

to sort

nc -l 8888
  listen on port 8888

nc server1 8888
  connect to port 8888
  • Ncat is a feature-packed networking utility which reads and writes data across networks from the command line. Ncat was written for the Nmap Project as a much-improved reimplementation of the venerable Netcat. It uses both TCP and UDP for communication and is designed to be a reliable back-end tool to instantly provide network connectivity to other applications and users. Ncat will not only work with IPv4 and IPv6 but provides the user with a virtually limitless number of potential uses.


  • Surfraw provides a fast unix command line interface to a variety of popular WWW search engines and other artifacts of power. It reclaims google, altavista, babelfish, dejanews, freshmeat, research index, slashdot and many others from the false-prophet, pox-infested heathen lands of html-forms, placing these wonders where they belong, deep in unix heartland, as god loving extensions to the shell.
  • Mininet creates a realistic virtual network, running real kernel, switch and application code, on a single machine (VM, cloud or native), in seconds, with a single command
  • OMNeT++ is an extensible, modular, component-based C++ simulation library and framework, primarily for building network simulators. "Network" is meant in a broader sense that includes wired and wireless communication networks, on-chip networks, queueing networks, and so on. Domain-specific functionality such as support for sensor networks, wireless ad-hoc networks, Internet protocols, performance modeling, photonic networks, etc., is provided by model frameworks, developed as independent projects. OMNeT++ offers an Eclipse-based IDE, a graphical runtime environment, and a host of other tools. There are extensions for real-time simulation, network emulation, alternative programming languages (Java, C#), database integration, SystemC integration, and several other functions.


  • OpenFlow enables networks to evolve, by giving a remote controller the power to modify the behavior of network devices, through a well-defined "forwarding instruction set". The growing OpenFlow ecosystem now includes routers, switches, virtual switches, and access points from a range of vendors.


  • Upside-Down-Ternet - My neighbours are stealing my wireless internet access. I could encrypt it or alternately I could have fun.



  • Scapy is a powerful interactive packet manipulation program. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them, match requests and replies, and much more. It can easily handle most classical tasks like scanning, tracerouting, probing, unit tests, attacks or network discovery (it can replace hping, 85% of nmap, arpspoof, arp-sk, arping, tcpdump, tethereal, p0f, etc.). It also performs very well at a lot of other specific tasks that most other tools can't handle, like sending invalid frames, injecting your own 802.11 frames, combining technics (VLAN hopping+ARP cache poisoning, VOIP decoding on WEP encrypted channel, ...), etc.



  • socat is a relay for bidirectional data transfer between two independent data channels. Each of these data channels may be a file, pipe, device (serial line etc. or a pseudo terminal), a socket (UNIX, IP4, IP6 - raw, UDP, TCP), an SSL socket, proxy CONNECT connection, a file descriptor (stdin etc.), the GNU line editor (readline), a program, or a combination of two of these. These modes include generation of "listening" sockets, named pipes, and pseudo terminals. 
socat -d -d TCP-L:22,reuseaddr,fork SYSTEM:"nc \$SOCAT_PEERADDR 22" # Confuse people SSHing to your host with a redirect back to theirs.
  • ncp - a fast file copy tool for LANs
  • bcp (Broadcast Copy) Any easy way to copy files between terminals or computers on a local network.
  • UDPcast is a file transfer tool that can send data simultaneously to many destinations on a LAN. This can for instance be used to install entire classrooms of PC's at once. The advantage of UDPcast over using other methods (nfs, ftp, whatever) is that UDPcast uses UDP's multicast abilities: it won't take longer to install 15 machines than it would to install just 2.
  • Tsunami UDP Protocol: A fast user-space file transfer protocol that uses TCP control and UDP data for transfer over very high speed long distance networks (≥ 1 Gbps and even 10 GE), designed to provide more throughput than possible with TCP over the same networks.


Monitoring

  • Netperf is a benchmark that can be used to measure the performance of many different types of networking. It provides tests for both unidirecitonal throughput, and end-to-end latency. The environments currently measureable by netperf include: TCP and UDP via BSD Sockets for both IPv4 and IPv6, DLPI, Unix Domain Sockets, SCTP for both IPv4 and IPv6
  • NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet, like most tools do, it groups bandwidth by process. NetHogs does not rely on a special kernel module to be loaded. If there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. This makes it easy to indentify programs that have gone wild and are suddenly taking up your bandwidth.
  • 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 transfered data and min/max network usage.
  • bwm-ng (Bandwidth Monitor NG) is a small and simple console-based live network and disk io bandwidth monitor for Linux, BSD, Solaris, Mac OS X and others.
  • tcptrack is a packet sniffer, which passively watches for connections on a specified network interface, tracks their states, and lists them in a manner similar to the Unix 'top' command. It displays source and destination addresses and ports, connection state, idle time, and bandwidth usage.
  • iftop does for network usage what top(1) does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "why is our ADSL link so slow?".
  • Wireshark is the world's foremost network protocol analyzer. It lets you see what's happening on your network at a microscopic level. It is the de facto (and often de jure) standard across many industries and educational institutions.
  • Ostinato is an open-source, cross-platform network packet crafter/traffic generator and analyzer with a friendly GUI. Craft and send packets of several streams with different protocols at different rates. For the full feature list see below. Ostinato aims to be "Wireshark in Reverse" and become complementary to Wireshark.
  • EtherApe is a graphical network monitor for Unix modeled after etherman. Featuring link layer, IP and TCP modes, it displays network activity graphically. Hosts and links change in size with traffic. Color coded protocols display.
  • hping is a command-line oriented TCP/IP packet assembler/analyzer. The interface is inspired to the ping(8) unix command, but hping isn't only able to send ICMP echo requests. It supports TCP, UDP, ICMP and RAW-IP protocols, has a traceroute mode, the ability to send files between a covered channel, and many other features.
  • 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.
  • Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.
  • Bro is a passive, open-source network traffic analyzer. It is primarily a security monitor that inspects all traffic on a link in depth for signs of suspicious activity. More generally, however, Bro supports a wide range of traffic analysis tasks even outside of the security domain, including performance measurements and helping with trouble-shooting. [4]

ntop

vnStat

  • vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't actually be sniffing any traffic and also ensures light use of system resources. However, in Linux at least a 2.2 series kernel is required.

sFlow

other

KVM

Emulation

General

Layer 1/2

xDSL

Fiber

Ethernet

Wireless

Wi-Fi

Other

Security

Virtual LAN

Ultrasonic

Layer 3/4

  • The History of Packets - This guide seeks to take you on the adventure of the changing packet, and how it has survived over the past four decades of networking hardware and computer software. The Internet started in the late 1960s as ARPANET.

IP

ARP

Protocol to resolve IPv4 addresses to lower level addressed, i.e., ethernet MAC.

Subnetting

Addressing

Routing

DHCP

NAT

ICMP

Tunnelling

  • iodine lets you tunnel IPv4 data through a DNS server. This can be usable in different situations where internet access is firewalled, but DNS queries are allowed.

IPsec

IPv6

Security

UDP

See also DNS

UPnP

TCP

See also HTTP, SSH, Gopher 

traceroute -m 100 216.81.59.173

Tunnelling

  • sshuttle - Transparent proxy server that works as a poor man's VPN. Forwards over ssh. Doesn't require admin. Works with Linux and MacOS. Supports DNS tunneling.
  • Localtunnel allows you to easily share a web service on your local development machine without messing with DNS and firewall settings. Localtunnel will assign you a unique publicly accessible url that will proxy all requests to your locally running webserver. [9]

Layer 5 / 6 / 7

See Communication

SNMP

telnet

HTTP

See HTTP

Gopher

FTP

VNC

Server

  • x11vnc allows one to view remotely and interact with real X displays (i.e. a display corresponding to a physical monitor, keyboard, and mouse) with any VNC viewer. In this way it plays the role for Unix/X11 that WinVNC plays for Windows.
  • Vinagre (Remote Desktop Viewer) is the default VNC client in Ubuntu 8.04. It currently allows you to connect to desktops running VNC servers and control them. Specific connection options are not currently supported, e.g. high or low bandwidth settings, but it is planned to add them in an upcoming version.

Client

  • noVNC - VNC client using HTML5 (WebSockets, Canvas) with encryption (wss://) support. There are many companies/projects that have integrated noVNC into their products including: Ganeti Web Manager, Archipel, openQRM, OpenNode, OpenStack, Broadway (HTML5 GDK/GTK+ backend), OpenNebula, CloudSigma, Zentyal (formerly Ebox), SlapOS, Intel MeshCentral, Amahi, Brightbox, Foreman, LibVNCServer, and PocketVNC.

Chicken is a VNC client for Mac OS X. A VNC client allows remote access to another computer over the network. Chicken is based on Chicken of the VNC.

NX

BGP

  • OpenBGPD is a FREE implementation of the Border Gateway Protocol, Version 4. It allows ordinary machines to be used as routers exchanging routes with other systems speaking the BGP protocol.

SOCKS

NFS

nfs - fstab format and options for the nfs file systems
mount.nfs

showmount -e server-Ip-address

http://linux.die.net/man/8/mount.cifs

SMB / CIFS

File sharing

Authentication, etc.

LDAP

Kerberos

SASL

RADIUS

Other

Messaging

RabbitMQ

Distributed

Consensus

Raft

Piping

VPN

PPTP

Not recommended for use any more.

L2TP

Requires use of encrypted protocol (IPsec). Uses UDP port 500, which is more easily blocked by NAT firewalls.

IPsec

IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite, while some other Internet security systems in widespread use, such as Secure Sockets Layer (SSL), Transport Layer Security (TLS) and Secure Shell (SSH), operate in the upper layers of the TCP/IP model. Hence, IPsec protects any application traffic across an IP network.

OpenVPN

Tinc

Services

Systems

  • BadVPN is a peer-to-peer VPN system. It provides a Layer 2 (Ethernet) network between the peers (VPN network nodes). The peers connect to a central server which acts as a chat server for them to establish direct connections between each other (data connections). These connections are used for transferring network data (Ethernet frames).
  • Freelan - A free, open-source, multi-platform, highly-configurable and peer-to-peer VPN software, designed to easily connect remote hosts and mainly focused on security and performance. [15]
  • Social VPN Project - free and open-source P2P Social Virtual Private Network (VPN) that seamlessly networks your computer with the computers of your friends.
  • SigmaVPN is simple, light-weight and modular VPN software for UNIX systems, deploying the NaCl encryption library. It's easy to configure, has low overheads and is reliable. No longer is it necessary to waste precious time configuring overcomplicated tunnels. [18]

Internet

Cloud

See also Cloud

  • Maestro is an "operating system" for orchestrating network control applications. Maestro provides interfaces for implementing modular network control applications to access and modify state of the network, and coordinate their interactions. Maestro is a platform for achieving automatic and programmatic network control functions using these modularized applications. Although this project focuses on building an OpenFlow controller using Maestro, Maestro is not only limited to OpenFlow networks.

Mesh

See also Open social.

General

Protocols

DSDV

Destination-Sequenced Distance-Vector Routing (DSDV) is a table-driven routing scheme for ad hoc mobile networks based on the Bellman–Ford algorithm. It was developed by C. Perkins and P.Bhagwat in 1994. The main contribution of the algorithm was to solve the routing loop problem. Each entry in the routing table contains a sequence number, the sequence numbers are generally even if a link is present; else, an odd number is used. The number is generated by the destination, and the emitter needs to send out the next update with this number. Routing information is distributed between nodes by sending full dumps infrequently and smaller incremental updates more frequently.

AODV

It is a reactive routing protocol, meaning that it establishes a route to a destination only on demand. In contrast, the most common routing protocols of the Internet are proactive, meaning they find routing paths independently of the usage of the paths. AODV is, as the name indicates, a distance-vector routing protocol. AODV avoids the counting-to-infinity problem of other distance-vector protocols by using sequence numbers on route updates, a technique pioneered by DSDV. AODV is capable of both unicast and multicast routing.

OLSR

Bmx6

  • Bmx6 is a routing protocol for Linux based operating systems.

Babel

Babel is based on the ideas in Destination-Sequenced Distance Vector routing (DSDV), Ad hoc On-Demand Distance Vector Routing (AODV), and Cisco's Enhanced Interior Gateway Routing Protocol (EIGRP), but it uses a variant of Expected Transmission Count (ETX) link cost estimation rather than a simple hop-count metric. It employs several techniques to ensure the absence of routing pathologies, such as routing loops. Babel operates on IPv4 and IPv6 networks. It has been reported to be a robust protocol and to have fast convergence properties.

Two implementations of Babel are freely available: the standalone sample implementation, and a version that is integrated into the Quagga routing suite. The version integrated into Quagga allows for authentication.

B.A.T.M.A.N.

HWMP

cjdns

Wanderlust

  • Wanderlust - A Worldwide Network with Distributed Routing through Location Swapping

Other

Router

Hardware

Projects

Networks

  • ninux.org is a Wireless Network Community in Italy. OLSR

Project Mesh Net

Serval

Commotion

OLSR

FabFi

OLSR

to sort


Stacks

Freedom Box

Byzantium

Other

ArcOS

Mapping

Darknets

Other

UK ISPs

Scotland

to sort

View The Daily Show, etc. in the UK, etc. Mofity HTTP headers; X-Forwarded-For "12.13.14.15" [22]

  • GLIF, the Global Lambda Integrated Facility, is an international consortium that promotes the paradigm of lambda networking.


  • OpenSignalMaps - database of cell phone towers, cell phone signal strength readings, and Wi-Fi access points around the world
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