Chapter Summary


OpenSSH is a suite of secure network connectivity tools that encrypts all traffic, including passwords, thereby thwarting malicious users who might otherwise eavesdrop, hijack connections, and steal passwords. The components discussed in this chapter are sshd (the server daemon), ssh (runs a command on or logs in on another system), scp (copies files to/from another system), sftp (securely replaces ftp), and ssh-keygen (creates authentication keys).

To ensure secure communications, when an OpenSSH client opens a connection, it first verifies that it is connected to the correct server. Then OpenSSH encrypts communication between the systems. Finally OpenSSH makes sure that the user is authorized to log in on or copy files from/to the server.

OpenSSH also enables secure X11 forwarding. With this feature, you can run securely a graphical program on a remote system and have the display appear on the local system.




A Practical Guide to Red Hat Linux
A Practical Guide to Red HatВ® LinuxВ®: Fedoraв„ў Core and Red Hat Enterprise Linux (3rd Edition)
ISBN: 0132280272
EAN: 2147483647
Year: 2006
Pages: 383

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