Introduction to Telnet SSH Client

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Introduction to Telnet / SSH Client

• Connecting to a remote computer

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What is Telnet / SSH Client?

• Internet tools providing remote login
  capabilities to computers on the Internet
• One computer can connect to another to use its
  services
• Connecting Privileges guest - usually logins
  are not required full - requires username and
  password.

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How will I use telnet?

• Connect to unixs.cis.pitt.edu (full privilege)
• Connect to vms.cis.pitt.edu (full privilege)
• Connect to computers where you do not have an
  account (guest privilege)

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Some Telnet Examples

• telnet unixs.cis.pitt.edu login to your unixs
  account
• telnet locis.loc.gov Connect to the Library of
  Congress
• telnet to Pitt library system
• -http(or telnet)//library.pitt.edu
• telnet madlab.sprl.umich.edu 3000 -Connect to
  Weather Underground at University of Michigan
• telnet penpages.psu.edu -Connect to Penpages at
  Penn State University

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SSH

• SSH is typically used to log into a remote
  machine and execute commands.
• Secure Shell or SSH is a network protocol that
  allows data to be exchanged over secure channel
  between two computers.
• SSH authenticates the remote computer and allows
  the remote computer to authenticate the user, if
  necessary.
• An SSH client is a software program which uses
  the secure shell protocol to connect to a remote
  computer.

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PuTTY

• PuTTY is a clinet program for the SSH and Telnet
  network protocols.
• PuTTY is available for both Windows and Various
  Unix Platforms.
• For instance, you can run PuTTY on a Windows
  machine, and tell it to connect to a Unix
  machine. PuTTY opens a Window. Then anything you
  type into that window is sent straight to the
  Unix machine, and everything the Unix machine
  sends back is displayed in the window. So you can
  work on the Unix machine as if you are sitting at
  its console, while actually sitting somewhere
  else.

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Telnet from Windows NT
SSH Client Windows XP
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Telnet from Unix
type command
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Telneting from Unix
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AFS

• Andrew File System (AFS) is a distributed
  netwoked file system developed by CMU.
• AFS has several benefits over traditional
  networked file systems, particularly in the areas
  of security and scalability.
• One of the characteristic of AFS is that each
  client caches files on the local filesytem for
  increased speed on subsequent requests for the
  same file. This allows limited filesystem access
  in the event of a server crash or a network
  outage.

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AFS Tokens

• An AFS token grants you your own permissions in
  an AFS cell. It verifies your identity to the
  file system.
• When you obtain an AFS Token?
• When you Enter your user name and password to a
  SSH session.
• When you enter your user name and password to a
  Windows Login Screen.

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AFS Tokens

• An AFS Token in only valid for 25 hours starting
  from the time you log in.
• When your AFS Token expires, you lose your AFS
  identity in the cell.
• On both Windows and Unix, you can type the
  command tokens at a command prompt to check for
  the existence and/or expiration date of AFS
  tokens.

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AFS Tokens

• How can you get an AFS token?
• Open the AFS authentication application
  either from the padlock icon in your system tray
  (beside the clock), or from the AFS program group
  (Start? Programs? OpenAFS) and look on the tokens
  tab to check, renew or discard your tokens.

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Map Your Network Drive (Account) from AFS