Admin Guide

Chapter 12: Secure Shell
The following sections describe how to use Secure Shell (SSH) to enable secure communications
support over a network for authentication, encryption, and network integrity.
Secure Shell fundamentals
Secure Shell (SSH) is a client and server protocol that specifies the way to conduct secure
communications over a network. The traffic these utilities generate is not encrypted when using
other methods of remote access such as Telnet or FTP. Anyone that can see the network traffic can
see all data, including passwords and user names. Secure Shell can replace Telnet and other
remote login utilities. Secure File Transfer Protocol (SFTP) can replace FTP with an encrypted
alternative.
Note:
The current release does not support Secure Copy (SCP). For the current release, use SFTP to
transfer files securely.
Secure Shell supports a variety of the different public and private key encryption schemes available.
Using the public key of the host server, the client and server negotiate to generate a session key
known only to the client and the server. This one-time key encrypts all traffic between the client and
the server. The VSP switch supports Secure Shell version 2 (SSHv2).
Figure 6: Overview of the SSHv2 protocol
October 2015 Administering Avaya VSP 7200 Series and 8000 Series 140
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