HP 5120 SI Series

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SSH2.0 configuration
This chapter includes these sections:
• SSH2.0 overview
• FIPS compliance
• Configuring the device as an SSH server
• Configuring the device as an SSH client
• Displaying and maintaining SSH
• SSH server configuration examples
• SSH client configuration examples
SSH2.0 overview
Introduction to SSH2.0
Secure Shell (SSH) offers an approach to logging in to a remote device securely. 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.
NOTE:
• When acting as an SSH server, the device supports SSH2.0 and SSH1 in non-FIPS mode, and supports
only SSH2.0 in FIPS mode. When acting as an SSH client, the device supports SSH2.0 only.
• Unless otherwise noted, SSH in this document refers to SSH2.0.
SSH operation
To establish an SSH connection and communicate with each other through the connection, an SSH client
and the SSH server go through the stages listed in Table 13.
Table 13 Stages in session establish
ment and interaction between an SSH client and the server
Sta
g
es Descri
p
tion
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 algorithms for
communication.
Authentication
The SSH server authenticates the client in response to the client's
authentication request.
Session request After passing authentication, the client sends a session request to the server.