Byte.com: Secure Remote Access With SSHMay 08, 2000, 23:01 (0 Talkback[s])
(Other stories by Tim Orbaker)
"Remote access to information is in higher demand as telecommuting increases. It's also very convenient to be able to manage your network from home, especially when your pager alerts you that mail is down at 3 am."
"Traditional methods of remote access include Telnet and the "r services" (rsh, rlogin, and rexec). These are solid, reliable tools when you're inside your firewall, but they are inherently insecure because traffic generated by these programs is not encrypted. Anyone who can see the traffic on the network can see your data. Sadly enough, this includes any user names and passwords that are sent...."
"The secure shell protocol (SSH) is one way to provide remote access without giving your information to anyone who might be watching. SSH provides a way to log in to another computer, like rsh or telnet, while encrypting all the information that is exchanged between two computers. Be advised that SSH is not the end of the solution. SSH is a very good place to start, but it doesn't replace other security measures. Firewalls and packet filters can help prevent spoofing. Kerberos, S/Key, and other authentication systems can be used to further augment the end-to-end encryption provided by SSH."