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Secure Shell for Computer Science Nick Czebiniak Sung-Ho Maeung

Secure Shell for Computer Science Nick Czebiniak Sung-Ho Maeung. What is SSH?. SSH (Secure Shell) is a full replacement for rsh, rlogin, rcp, telnet , rexec, rcp and ftp Automatic authentication of users, no passwords are sent in clear text

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Secure Shell for Computer Science Nick Czebiniak Sung-Ho Maeung

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  1. Secure Shell for Computer ScienceNick CzebiniakSung-Ho Maeung

  2. What is SSH? • SSH (Secure Shell) is a full replacement for rsh, rlogin, rcp, telnet, rexec, rcp and ftp • Automatic authentication of users, no passwords are sent in clear text • Secure remote login, file copying, and tunneling X11 and TCP connections( POP, IMAP, SMTP, HTTP )

  3. When will I need SSH in CS? • By June 18st 2001, telnet service will no longer be available on CS machines. • Used to telnet into CS server from outside • Need SSH as a replacement for telnet, rlogin, rsh

  4. What SSH clients are available for PCs, Macs, and Linux ? • SecureCRT: http://www.vandyke.co • 32bit version for Win98/98/2000/NT • F-Secure: http://f-secure.com • Windows and Mac versions • SSH Secure Shell: http://www.ssh.com • Excellent free SSH client for Windows and Linux • TeraTerm Pro: http://www.zip.com.au/~roca/ttssh.html • A free SSH Client for Windows • Mindterm: http://www.mindbright.se/mindterm/ • A java based client for Windows and Mac

  5. Secure Shell

  6. How to connect? • Hostname: tin.cs.rit.edu • Username: abc1234 • Port Number: 22

  7. Keys

  8. SSH tunneling and Port Forwarding • Port forwarding • How to set up • Depend on the SSH client you use. • ( SecureShell ) – www.ssh.com • “listen port” – client port number • Ex) localhost:port# • “destination host” – server address • tin.cs.rit.edu • “destination port “ – server port number • “outgoing” and “incoming” tunnels • need “outgoing” tunnels

  9. Tunneling and Port Forwarding

  10. Secure Shell

  11. SSH on CS machines • Located in .ssh2 directory • Inside this directory • ssh-keygen2 • Passphrase: ******** • Again: ******* • Public key saved • Private key saved

  12. SSH on CS Machines • Once setup, need to create identification and authorization files for ssh2 • touch identification • touch authorization • Edit these 2 files • Enter a private key in the identification file • Enter a public key in the authorization file

  13. Conclusion • Secure your data over the Internet. • Secure your program over ftp. • Use SSH service as soon as possible

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