User Guide

OmniAccess SafeGuard OS Administration Guide
31
Chapter 2: Accessing and Managing the System
no ip telnet timeout
The following example sets the Telnet connection timer to never expire:
(SafeGuardOS)# configure terminal
(SafeGuardOS) (config) # ip telnet timeout 0
(SafeGuardOS) (config) #
Using Secure Shell (SSH)
Like Telnet, Secure Shell (SSH) is a protocol that allows the logging into of another
computer over a network to execute commands in a remote machine, and to move files
from one machine to another. Unlike Telnet that sends text in a clear text format, however,
SSH encrypts the connection session.
SSH provides more security fo
r remote connections than Telnet by providing strong
encryption when a device is authenticated. The SafeGuard OS supports:
■ SSH version 1 (SSHv1)
■ SSH version 2 (SSHv2)
■ Rivest, Shamir and Adleman (RSA) keys, versions 1 and 2
■ Digital Signature Standard (DSA) keys
■ A maximum of 5 SSH sessions
This section describes basic SSH commands that may be useful when first accessing a
SafeGuard device via a SSH session.
See the following sections:
■ Enabling an SSH Session
■ Downloading SSH Key Files from TFTP Server
■ Generating DSA, RSA, RSA Keys
■ Deleting DSA, RSA, RSA Keys
Syntax Description timeout Sets the number of minutes that a session can
be idle. Valid range is a decimal value from 0
to 160. A value of 0 indicates that the session
remains active indefinitely. The default value is
5.
NOTE: SafeGuard OS does not support SSH passwords or passkeys.