1-1
1 SSH2.0 Configuration
When configuring SSH2.0, go to these sections for information you are interested in:
z SSH2.0 Overview
z Configuring the Device as an SSH Server
z Configuring the Device as an SSH Client
z Displaying and Maintaining SSH
z SSH Server Configuration Examples
z SSH Client Configuration Examples
SSH2.0 Overview
Introduction to SSH2.0
Secure Shell (SSH) offers an approach to securely logging into a remote device. By encryption and
strong authentication, it protects devices against attacks such as IP spoofing and plain text password
interception.
The device can not only work as an SSH server to support connections with SSH clients, but also work
as an SSH client to allow users to establish SSH connections with a remote device acting as the SSH
server.
Currently, when acting as an SSH server, the device supports two SSH versions: SSH2.0 and SSH1.
When acting as an SSH client, the device supports SSH2.0 only.
Operation of SSH
The session establishment and interaction between an SSH client and the SSH server involves the
following five stages:
Table 1-1 Stages in session establishment and interaction between an SSH client and the server
Stages Description
Version negotiation
SSH1 and SSH2.0 are supported. The two parties negotiate a
version to use.
Key and algorithm negotiation
SSH supports multiple algorithms. The two parties negotiate an
algorithm for communication.
Authentication
The SSH server authenticates the client in response to the
client’s authentication request.
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