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Linux Gazette: Using sshJan 07, 2001, 19:30 (0 Talkback[s])
(Other stories by Matteo Dell'Omodarme)
"Every time we telnet into a remote machine the connection data will cross the local network, giving an eventual intruder the possibility to spy the connection and eventually insert some malicious commands into the data flux. The use of some strong cryptography systems will allow an enormous improvement in the security of the net."
"From the manual page of ssh we can learn that: "Ssh (Secure Shell) is a program for logging into a remote machine and executing commands in a remote machine. It is intended to replace rlogin and rsh, and provide secure encrypted communications between two untrusted hosts over an insecure network. X11 connections and arbitrary TCP/IP ports can also be forwarded over the secure channel". It is a powerful, very easy-to-use program that uses strong cryptography for protecting all transmitted confidential data, including passwords."
"At present time there are two SSH protocol, referred as SSH2 and SSH1, the first one being an improvement of the SSH1 protocol. SSH2 now supports other key-exchange methods besides double-encrypting RSA key exchange. The current distribution comes with Diffie-Hellman key exchange and has support for DSA and other public key algorithms besides RSA."
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