| dnscheck-engine (V) | | DNSCheck is a DNS quality checker |
| dnsdoctor | | DNS zones misconfigurations or inconsistencies diagnostic tool |
| dnsmasq | | Lightweight, easy to configure DNS forwarder |
| dnstop | | Diagnose tcpdump trace for DNS queries/replies |
| dnstracer | | Tool to trace dns queries |
| docsis | | Utility for manipulating DOCSIS-compliant cable modems |
| driftnet | | Real-time image sniffer |
| drill | | DNSSEC debugging tool a'la dig |
| dtcp | | Dynamic Tunnel Configuration Protocol daemon and client |
| dtcpclient | | Dynamic Tunnel Configuration Protocol client |
| dtorrent | | Enhanced CTorrent, a BitTorrent console client written in C/C++ |
| dynipclient | | Client for the dynip.com dynamic DNS service |
| echoping | | Test performance of a remote TCP service |
| ed2k-gtk-gui | | GUI for the eDonkey2000 and Overnet |
| edonkey2k | | Yet another P2P file sharing tool |
| ekiga | | VoIP and video conferencing application for GNOME |
| entropy | | Anonymous peer-to-peer networking node (similar to Freenet) |
| etherape | | Graphical network monitor |
| ethtool (V) | | Display or change ethernet card settings |
| ettercap | | Multipurpose sniffer/interceptor/logger for switched LAN |
| ettercap-NG | | Multipurpose sniffer/interceptor/logger for switched LAN |
| eventlog (V) | | New API to format and send structured log messages |
| expiretable (V) | | Removes entries from pf tables based on their age |
| ez-ipupdate | | Client to update dynamic DNS entries |
| fair-identd | | Fast RFC-1413 identd running under inetd that returns no useful info |
| fetch | | Client to fetch URLs |
| filezilla | | FTP, FTPS and SFTP client with intuitive GUI |
| firewalk | | Determines the filter rules on a packet forwarding device |
| flodo | | Simple network flow sampling tool |
| flow-tools | | Collect and store NetFlow data |
| fmirror | | Mirror program for FTP sites (written in C) |
| fpdns | | Fingerprinting DNS servers |
| fping | | Quickly ping many hosts w/o flooding the network |
| fping6 | | Quickly ping many hosts w/o flooding the network |
| freenet-tools | | Freenet Tools, freesite manipulation tools for Freenet and Entropy |
| freeradius | | Free RADIUS server implementation |
| freeradius2 | | Free RADIUS server implementation |
| freewais-sf | | Enhanced Wide Area Information Server |
| ftplibpp | | C++ class providing ftp client functionality |
| ftpproxy | | Application level gateway for FTP |
| ganglia-monitor-core (V) | | Ganglia cluster monitor, monitoring daemon |
| gated | | Routing protocol daemon |
| gethost | | Hostname and IP resolver for testing /etc/hosts and nsswitch.conf |
| gift | | Modular daemon that abstracts filesharing protocols |
| gift-fasttrack | | Fasttrack plugin for giFT |
| gift-gnutella | | Gnutella plugin for giFT |
| gift-openft | | OpenFT Plugin for the gift daemon |
| giftcurs | | Curses frontend to the giFT daemon |
| gini | | Free streaming media server |
| gkrellm-multiping | | Pings several machines and prints out stats |
| gkrellm-snmp | | GKrellM plugin to display values collected from a SNMP agent |
| gkrellm-wireless | | Wavelan signal strength monitor for gkrellm |
| gnapfetch | | Update/maintain opennap servers for gnapster/TekNap |
| gnet | | Simple network library |
| gnet1 | | Simple network library (older version) |
| gnetcat | | Read and write data across network connections |
| gnome-netstatus | | Network status applet for the GNOME panel |
| gnome-nettool | | GNOME interface for various network tools |
| gnome-vfs-smb | | GNOME Virtual File System (v2) - smb plugin |
| gnugk | | H.323 Gatekeeper |
| gofish | | Gopher server |
| gopher | | Distributed document delivery client |
| gsnmp | | SNMP library |
| gssdp | | SSDP library |
| gst-plugins0.10-mms | | Open source multimedia framework - mms plugin |
| gst-plugins0.10-soup | | Open source multimedia framework - soup plugin |
| gt-itm | | GT Internetwork Topology Models |
| gtk-gnutella | | GTK-based gnutella client |
| gtk-vnc | | VNC viewer widget for GTK |
| gtk_wicontrol | | GTK+-based Wavelan status meter |
| gupnp | | Framework for UPnP devices |
| gupnp-av | | Helpers for audio/video applications using GUPnP |
| gupnp-igd | | Library to handle UPnP IGD port mapping |
| gupnp-tools | | Framework for UPnP devices |
| hesiod | | Hesiod network database client and library |
| hf6to4 | | Enables 6to4 IPv6 automatic tunnels |
| hlfl | | High Level Firewall Language |
| hobbitclient | | Free-software client for the Hobbit monitor |
| hobbitmon | | Network services monitor a la Big Brother |
| host | | Powerful DNS query and testing tool |
| howl | | Zeroconf (Rendezvous) implementation |
| hping | | Command-line oriented TCP/IP packet assembler/analyzer |
| hping3 | | Command-line oriented TCP/IP packet assembler/analyzer |
| httping | | Like 'ping' but for http-requests |
| httptunnel | | Encapsulate TCP/IP connections in HTTP requests |
| icsi-finger | | Distributed finger service |
| ifstat (V) | | Tool to report network interfaces bandwidth |
| iftop | | Display bandwidth usage on an interface |
| iisemulator (V) | | IIS emulator |
| inadyn | | Dynamic DNS client |
| ipcalc | | IP Calculator |
| ipcheck | | Python client for the dyndns service |
| iperf | | TCP and UDP bandwidth performance measurement tool |
| ipgrab | | Verbose packet sniffer for UNIX hosts |
| iplog | | Iplog is a tool using pcap to log IP traffic |
| ipv6calc | | Manipulates IPv6 addresses |
| ipw | | whois replacement that automatically queries several databases |
| irrd | | Internet Routing Registry Daemon |
| irrtoolset-nox11 | | The Internet Routing Registry Toolset - client to IRRd |
| irrtoolset5 | | The Internet Routing Registry Toolset - client to IRRd |