Anonymous FTP

A host which provides an FTP service may additionally provide Anonymous FTP access as well. Under this arrangement, users do not strictly need an account on the host. Instead the user typically enters 'anonymous' or 'ftp' when prompted for username. Although users are commonly asked to send their email address as their password, little to no verification is actually performed on the supplied data.

As modern FTP clients typically hide the anonymous login process from the user, the ftp client will supply dummy data as the password (since the user's email address may not be known to the application).

For example, the following ftp user agents specify the listed passwords for anonymous logins:

* Mozilla Firefox (2.0) — mozilla@example.com

* KDE Konqueror (3.5) — anonymous@

* wget (1.10.2) — -wget@

* lftp (3.4.4) — lftp@

The Gopher protocol has been suggested as an alternative to anonymous FTP, as well as Trivial File Transfer Protocol and File Service Protocol.

Technorati Tags: TFTP,Anonymous FTP,FTP,File transfer,Protocol,FTP Service,Access,Modern FTP,Login Process,Mozilla,KDE,Wget,Lftp,Gopher Protocol

Telnet

Telnet (Telecommunication network) is a network protocol used on the Internet or local area network (LAN) connections. It was developed in 1969 beginning with RFC 15 and standardized as IETF STD 8, one of the first Internet standards.

The term telnet also refers to software which implements the client part of the protocol. Telnet clients are available for virtually all platforms. Most network equipment and OSes with a TCP/IP stack support some kind of Telnet service server for their remote configuration (including ones based on Windows NT). Because of security issues with Telnet, its use has waned as it is replaced by the use of SSH for remote access.

"To telnet" is also used as a verb meaning to establish or use a Telnet or other interactive TCP connection, as in, "To change your password, telnet to the server and run the passwd command".

Most often, a user will be telnetting to a Unix-like server system or a simple network device such as a router. For example, a user might "telnet in from home to check his mail at school". In doing so, he would be using a telnet client to connect from his computer to one of his servers. Once the connection is established, he would then log in with his account information and execute operating system commands remotely on that computer, such as ls or cd.

On many systems, the client may also be used to make interactive raw-TCP sessions. It is commonly believed that a telnet session which does not include an IAC (character 255) is functionally identical. This is not the case however due to special NVT (Network Virtual Terminal) rules such as the requirement for a bare CR (ASCII 13) to be followed by a NULL (ASCII 0).

Anonymous FTP

Many sites that run FTP servers enable anonymous ftp. Under this arrangement, users do not need an account on the server. The user name for anonymous access is typically 'anonymous', but historically 'ftp' was also used in the past; this account does not need a password.

Although users are commonly asked to send their email addresses as their passwords for "authentication," there is usually only trivial or no verification of what is actually entered. As modern FTP clients hide the login process from the user, and usually don't know the user's email address, the software supplies dummy passwords. For example:
Mozilla Firefox (2.0) — mozilla@example.com
KDE Konqueror (3.5) — anonymous@
wget (1.10.2) — -wget@
lftp (3.4.4) — lftp@

Internet Gopher has been suggested as an alternative to anonymous FTP, as well as Trivial File Transfer Protocol and File Service Protocol.