SSH - Secure ShellWhat is SSH?Slide 3Why Use SSH?VulnerabilitiesResourcesSSH - Secure ShellCecilia FlyCSIS 4490 Linux System AdministrationWhat is SSH?SSH, or Secure Shell, is a program that allows you to securely login to a remote computer over a networkFunctionally similar to telnet, it was designed to replace the traditional rsh, rlogin, rcpUses strong authentication, public key encryption, and various ciphers to insure integrityWhat is SSH?There are currently two versions of SSH available: SSH1 and SSH2, with advantages and disadvantages to each version.SSH can provide secure channels for ftp and telnet through tunneling Provides secure X Windows SessionsAvailable for UNIX/Linux, Windows, Macintosh, and some browser-based clientsWhy Use SSH?The transmission of data over a connection with a remote computer is not a straight path – it travels through several other machines on its way.Data is sent in clear text and is easily intercepted SSH defends your machine and communicationsVulnerabilitiesMan-in-the-middle attackOtherwise Compromised systemsResourcesSSH Communications Security :http://www.ssh.fi/index.cfmOhio State University: http://www.math.ohio-state.edu/support/ssh/Written by Thomas Koenig: http://www.uni-karlsruhe.de/~ig25/ssh-faq/index.html University of Illinois: http://www.aae.uiuc.edu/systems/ssh.htmlby Kimmo Suominen: http://www.tac.nyc.ny.us/kim/ssh/Ohio State University: http://wks.uts.ohio-state.edu/unix_course/intro-55.html#HEADING55-0Indiana University: http://www.cs.indiana.edu/docproject/zen/zen-1.0_7.htmlRSA Security: