Non User
Index: > A B C D E F G H I J K L M N O P Q R S T U V W X Y Z	Business Non User Industries Finance Tax

Home > OpenSSH

1 History

OpenSSH was created by the OpenBSD team as an open alternative to SSH, which is now proprietary software. Its developers claim that OpenSSH is more secure than the original, partly due to the reputation of the OpenBSD developers in emphasising clean and well-audited code, which in turn contributes to security. Its security is further attributed to the fact that its source code is released under an Open Source license, the BSD license (to which the "Open" in the name refers). Although source code is available for the original SSH, various restrictions are imposed on its use and distribution, making OpenSSH a more attractive project for many software developers.

2 Portability

Since OpenSSH performs authentication, in particular, it runs into a lot of differences between operating systems. The OpenSSH Portability Team is responsible for adding code necessary for portability and issuing "Portable releases".

3 Programs included

The OpenSSH suite includes:

• ssh (replaces rlogin and telnet) ssh tero@example.com
• scp (replaces rcpRemote Copy Protocol rcp is a TCP/IP-based protocol used to copy files between computers on a network. rcp is also a name of Unix-originated program implementing this protocol. rcp has been largely superseded by more secure applications, such as the scp a) scp tero@example.com: .
• sftp (replaces ftp) sftp tero@example.com
• sshd (the SSH daemonIn Unix and other computer operating systems, a daemon sometimes called a phantom is a particular class of computer program that runs in the background, rather than under the direct control of a user; they are usually instantiated as processes. Systems of) sshd

4 Secure tunnels

Most programs can be secured with OpenSSH, making it a strong alternative for VPN systems.

Any program using TCPTransmission Control Protocol (TCP is a connection-oriented, reliable delivery byte-stream transport layer communication protocol, currently documented in IETF RFC 793. It does the task of the transport layer in the simplified OSI model of computer networ connections (and preferably a single tcp port) can be used through secure tunnel. Some examples of easily tunneled programs are X Window SystemIn computing, the X Window System (commonly X11 or X is a windowing system for bitmap displays. It is the standard graphical interface on Unix, Unix-like operating systems and OpenVMS, and is available for most other modern operating systems. X provides t, http using a proxy and vnc. X Window System tunnel is often created automatically between two Unix computers, so GUI programs from remote computers can be run simply by typing their names:

Programs whose tunneling is possible but slightly complex are ftp (not needed because of sftp) and SMB.

Some programs call OpenSSH to create the tunnel, such as DistCC, CVS, rsync, and fetchmail.

Remote filesystems can be mounted trough ssh using shfs , lufs or podfuk .

Politics	Business	Finance

Topics: OpenSSH Openssh Ssh Programs Authentication Pam Open Secure...

---

OpenSSHOpenSSH Open Secure Shell , a set of computer programs providing encrypted communication sessions over a computer network. It was created as an open alternative to Secure Shell (SSH). History OpenSSH was created by the OpenBSD team as an open alternative