| deforaos-vncviewer | | DeforaOS desktop VNC viewer |
| delegate | | General purpose TCP/IP proxy system |
| deskflow | | Let a user share a mouse and keyboard among computers |
| deviceatlas-enterprise-c (V) | | DeviceAtlas Device Detection C API |
| dgd | | Object-oriented programmable server |
| dhcpcd | | DHCP / IPv4LL / IPv6RA / DHCPv6 client |
| dhcpcd-dbus | | DBus binding for dhcpcd |
| dhcpcd-gtk | | GTK+ system tray monitor for dhcpcd |
| dhcpcd-icons | | Shared icons for dhcpcd-gtk and dhcpcd-qt |
| dhcpcd-qt | | Qt system tray monitor for dhcpcd |
| dhcpd-pools | | ISC dhcpd lease analysis and reporting |
| dhcpsd | | DHCP server |
| dhid | | Dynamic Host Information System client daemon |
| dhisd | | DynDNS server |
| divoom (V) | | Rust Library for controlling divoom devices that support REST APIs |
| djbdns | | Collection of secure and reliable DNS tools |
| djbdns-run | | Configures djbdns to cache and serve queries |
| djbdnscurve6 | | Fork of djbdns with IPv6 and DNSCurve support |
| dlint | | Internet Domain Name System (DNS) error checking utility |
| dnc | | CLI tool to check domain names configuration |
| dnscap | | Network capture utility designed specifically for DNS traffic |
| dnscontrol | | Opinionated platform for managing DNS configuration |
| dnscrypt-proxy2 | | DNS proxy with support for encrypted protocols |
| dnsdist | | Highly DNS-, DoS- and abuse-aware loadbalancer |
| 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 |
| doh | | A tool for resolving host names using DNS-over-HTTPS (DoH) |
| dq | | Recursive DNS/DNSCurve server |
| 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++ |
| duplicity (V) | | Remote encrypting incremental backup utility |
| 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 |
| enet | | Network communication layer that runs on top of UDP |
| entropy | | Anonymous peer-to-peer networking node (similar to Freenet) |
| erlang-esip | | ProcessOne SIP server component in Erlang |
| erlang-idna | | Pure Erlang IDNA implementation following the RFC5891 |
| erlang-stun | | STUN and TURN library for Erlang / Elixir |
| erlang-xmpp | | XMPP parsing and serialization library on top of Fast XML |
| ether2dns | | Converter from /etc/ethers to IPv6 DNS records |
| etherape | | Graphical network monitor |
| ethersync (V) | | Peer-to-peer, editor-agnostic collaborative editing |
| ethtool (V) | | Display or change ethernet card settings |
| ettercap | | Suite for man in the middle attacks |
| ettercap-gtk | | Suite for man in the middle attacks (with GTK GUI) |
| eventd (V) | | Small daemon to act on remote or local events |
| exabgp | | BGP swiss army knife |
| expiretable (V) | | Removes entries from pf tables based on their age |
| ez-ipupdate | | Client to update dynamic DNS entries |
| fabric (V) | | Simple Pythonic remote deployment tool |
| fair-identd | | Fast RFC-1413 identd running under inetd that returns no useful info |
| fastd | | Fast and small VPN tunnelling daemon |
| fd-proxy | | Glue for making a TCP proxy using ucspi-tcp tools |
| fehqlibs | | State-of-the-art C routines for Internet services |
| fetch | | Client to fetch URLs |
| filezilla | | FTP, FTPS, and SFTP client with intuitive GUI |
| firewalk | | Determines the filter rules on a packet forwarding device |
| flickcurl | | Flickr API library |
| 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 |
| freeDiameter | | Open source Diameter protocol implementation |
| freenet-tools | | Freenet Tools, freesite manipulation tools for Freenet and Entropy |
| freeradius | | Free RADIUS server implementation |
| freeradius-freetds | | Free RADIUS FreeTDS support |
| freeradius-iodbc | | Free RADIUS iODBC support |
| freeradius-krb5 | | Free RADIUS rlm_krb5 module |
| freeradius-ldap | | Free RADIUS rlm_ldap module |
| freeradius-memcached | | Free RADIUS support for memcached |
| freeradius-mysql | | Free RADIUS MySQL support |
| freeradius-perl | | Free RADIUS rlm_perl module |
| freeradius-pgsql | | Free RADIUS PostgreSQL support |
| freeradius-python | | Free RADIUS rlm_python module |
| freeradius-rest | | Free RADIUS rlm_rest module |
| freeradius-sqlite3 | | Free RADIUS SQLite support |
| freeradius-unixodbc | | Free RADIUS UNIXODBC support |
| freeradius-yubikey | | Free RADIUS rlm_yubikey module |
| freerdp2 | | Free implementation of the Remote Desktop Protocol (major version 2) |
| frr | | Frr routing multi protocol suite |
| fstrm | | C implementation of the Frame Streams data transport protocol |
| ftplibpp | | C++ class providing ftp client functionality |
| ftpproxy | | Application level gateway for FTP |
| fusionpbx (V) | | Full-featured multi-tenant GUI for FreeSwitch |
| fwknop | | Port knocking via Single Packet Authorization (SPA) |
| gallery-dl | | Command-line program to download image galleries and collections |
| ganglia-monitor-core (V) | | Ganglia cluster monitor, monitoring daemon |
| GeoIP | | GeoIP Legacy C API |
| Geomyidae | | Gopher daemon |
| get_iplayer | | Search, index, record or stream BBC iPlayer broadcasts |
| get-flash-videos | | Tool for using various Flash-based video hosting sites |
| gethost | | Hostname and IP resolver for testing /etc/hosts and nsswitch.conf |