Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 911

53-1002269-02

Chapter

Configuring SSH2 and SCP

SSH version 2 support

Secure Shell (SSH) is a mechanism for allowing secure remote access to management functions on

a device. SSH provides a function similar to Telnet. Users can log into and configure the device

using a publicly or commercially available SSH client program, just as they can with Telnet.

However, unlike Telnet, which provides no security, SSH provides a secure, encrypted connection to

the device.

The SSH2 implementation is compatible with all versions of the SSH2 protocol (2.1, 2.2, and so

on). At the beginning of an SSH session, the device negotiates the version of SSH2 to be used. The

highest version of SSH2 supported by both the device and the client is the version that is used for

the session. Once the SSH2 version is negotiated, the encryption algorithm with the highest

security ranking is selected to be used for the session.

PowerConnect device also support Secure Copy (SCP) for securely transferring files between a

device and SCP-enabled remote hosts.

NOTE

The SSH feature includes software that is copyright Allegro Software Development Corporation.

SSH2 is supported in the Layer 2 and Layer 3 codes, and SSH version 1 (SSH1) is no longer

supported. Refer to Chapter 30, “Configuring SSH1 and SCP”.

SSH2 is a substantial revision of Secure Shell, comprising the following hybrid protocols and

definitions:

• SSH Transport Layer Protocol

• SSH Authentication Protocol

• SSH Connection Protocol

• SECSH Public Key File Format

• SSH Fingerprint Format

• SSH Protocol Assigned Numbers

• SSH Transport Layer Encryption Modes

• SCP/SFTP/SSH URI Format

Tested SSH2 clients

The following SSH clients have been tested with SSH2:

• SSH Secure Shell 3.2.3

• Van Dyke SecureCRT 4.0 and 4.1

• F-Secure SSH Client 5.3 and 6.0

• PuTTY 0.54 and 0.56