This program allows a user to transfer files to and from a remote site, and offers additional features that are not found in the standard interface, FTP. This version includes full screen ncurses support, but no SOCKS support.

(Source: http://www.debian.org)

This File Transfer Protocol daemon supports hidden directories, virtual hosts, and per-directory ".ftpaccess" files. It uses a single main configuration file, with syntax similar to Apache.

Because of the advanced design, anonymous-FTP directories can have an arbitrary internal structure (bin, lib, etc, and special files are not needed). Advanced features like multiple password files and upload/download ratios are also supported.

This package contains only the basic functionality of proftpd and PAM authentication.

More information can be found at http://www.proftpd.net/.

(Source: http://www.debian.org)

Lynx is a fully-featured World Wide Web (WWW) client for users running cursor-addressable, character-cell display devices (e.g., vt100 terminals, vt100 emulators running on PCs or Macs, or any other "curses-oriented" display). It will display HyperText Markup Language (HTML) documents containing links to files residing on the local system, as well as files residing on remote systems running Gopher, HTTP, FTP, WAIS, and NNTP servers.

(Source: http://www.debian.org)

The most popular server in the world, Apache features a modular design and supports dynamic selection of extension modules at runtime. Some of its strong points are its range of possible customization, dynamic adjustment of the number of server processes, and a whole range of available modules including many authentication mechanisms, server-parsed HTML, server-side includes, access control, CERN httpd metafiles emulation, proxy caching, etc. Apache also supports multiple virtual homing.

Separate Debian packages are available for PHP3, mod_perl, Java Servlet support, Apache-SSL and other common extensions. More information is available at http://www.appache.org.

(Source: http://www.debian.org)

-          MIME support (including RFC1522 encoding/decoding of 8-bit message headers).

-          PGP/MIME support (RFC 2015).

-          Advanced IMAP client supporting Kerberos authentication (and in some situations SSL encryption).

-          POP3 support.

-          Mailbox threading (both strict and non-strict).

-          Default keybindings are much like ELM.

-          Keybindings are configurable; Mush and PINE-like ones are provided as examples.

-          Handles MMDF, MH and Maildir in addition to regular mbox format.

-          Messages may be (indefinitely) postponed.

-          Colour support.

-          Highly configurable through easy but powerful rc file.

(Source: http://www.debian.org)

Fetchmail is a free, full-featured, robust, and well-documented remote mail retrieval and forwarding utility intended to be used over on-demand TCP/IP links (such as SLIP or PPP connections). It retrieves mail from remote mail servers and forwards it to your local (client) machine's delivery system, so it can then be read by normal mail user agents such as mutt, elm, pine, (x)emacs/gnus, or mailx. The fetchmailconf package includes an interactive GUI configurator suitable for end-users. Kerberos IV & V, RPA, OPIE and GSSAPI support are available if the package is recompiled. SSL is provided by the fetchmail-ssl package.

(Source: http://www.debian.org)

DHCP/BOOTP client written by Redhat (Source: http://www.debian.org)

DHCP is a protocol like BOOTP (actually dhcpd includes much of the functionality of BOOTPD!). It assigns IP addresses to clients based on lease times. DHCP is used extensively by Microsoft and more recently also by Apple. It is probably essential in any multi-platform environment.

Multiple Ethernet Interfaces are supported by this DHCP package. You need to run Linux 2.0.32 or later. (Source: http://www.debian.org)

The Berkeley Internet Name Domain (BIND) implements an Internet domain name server. BIND is the most widely-used name server software on the Internet, and is supported by the Internet Software Consortium.

BIND (Berkeley Internet Name Domain) is an implementation of the Domain Name System (DNS) protocols and provides an openly redistributable reference implementation of the major components of the Domain Name System, including:

- a Domain Name System server (named)

- a Domain Name System resolver library

- tools for verifying the proper operation of the DNS server

The BIND DNS Server is used on the vast majority of name serving machines on the Internet, providing a robust and stable architecture on top of which an organization's naming architecture can be built. The resolver library included in the BIND distribution provides the standard APIs for translation between domain names and Internet addresses and is intended to be linked with applications requiring name service. (Source http://www.isc.org)

Sshd listens for connections form clients. It’s normally started at boot from /etc/rc. For each connection, the daemon handels key exchange, encryption, authentication, command execution, and data exchange.

SSH protocol version 2: Each host has a host-specific key (RSA or DSA) used to identify the host.            However, when the daemon starts, it does not generate a server key.  Forward security is provided through a Diffie-Hellman key agreement.  This key agreement results in a shared session key.

The rest of the session is encrypted using a symmetric cipher, currently 128 bit AES, Blowfish, 3DES, CAST128, Arcfour, 192 bit AES, or 256 bit AES.  The client selects the encryption algorithm to use from those offered by the server. Additionally, session integrity is provided through a cryptographic message authentication code (hmac-sha1 or hmac-md5).

Protocol version 2 provides a public key based user (PubkeyAuthentication) or client host (HostbasedAuthentication) authentication method,conventional password authentication and challenge response based methods.

(Source: http://www.hmug.org)

This is the portable version of OpenSSH, a free implementation of the Secure Shell protocol as specified by the IETF secsh working group.

Ssh (Secure Shell) is a program for logging into a remote machine and for executing commands on a remote machine. It provides secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel. It is intended as a replacement for rlogin, rsh and rcp, and can be used to provide applications with a secure communication channel.

(Source: http://www.debian.org)

The telnet command is used for interactive communication with another host using the TELNET protocol.

(Source: http://www.debian.org)

The in.telnetd program is a server which supports the DARPA telnet interactive communication protocol.

(Source: http://www.debian.org)

This program allows you to dump the traffic on a network. tcpdump is able to examine IPv4, ICMPv4, IPv6, ICMPv6, UDP, TCP, SNMP, AFS BGP, RIP, PIM, DVMRP, IGMP, SMB, OSPF, NFS and many other packet types.

It can be used to print out the headers of packets on a network interface, filter packets that match a certain expression. You can use this tool to track down network problems, to detect "ping attacks" or to monitor network activities. More information is at http://www.tcpdump.org.

(Source: http://www.debian.org)

IPTraf is an ncurses-based IP LAN monitor that generates various network statistics including TCP info, UDP counts, ICMP and OSPF information, Ethernet load info, node stats, IP checksum errors, and others.

Note that since 2.0.0 IPTraf requires a kernel >= 2.2

(Source: http://www.debian.org)

GNU nano is a free replacement for Pico, the default Pine editor. Pine is copyrighted under a slightly restrictive license, that makes it unsuitable for Debian's main section. GNU nano is an effort to provide a Pico-like editor, but also includes some features that were missing in the original, such as 'search and replace', 'goto line' or internationalization support. As it's written from scratch, it's smaller and faster.

(Source: http://www.debian.org)

GNU Emacs is the extensible self-documenting text editor.

(Source: http://www.debian.org)