Administrator Guide

ip ssh authentication-retries
Configure the maximum number of attempts that should be used to authenticate a user.
C9000 Series
Syntax
ip ssh authentication-retries 1-10
Parameters
1-10 Enter the number of maximum retries to authenticate a user. The range is from 1 to 10.
The default is 3.
Defaults 3
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.1.1.0 Introduced on the E-Series.
Usage Information This command specifies the maximum number of attempts to authenticate a user on an SSH connection with the
remote host for password authentication. SSH disconnects when the number of password failures exceeds
authentication-retries.
ip ssh challenge–response–authentication
Enable challenge response authentication for SSHv2.
Syntax
ip ssh challenge-response-authentication enable
To disable the challenge response authentication, use the no ip ssh challenge-response-
authentication enable command.
Parameters
enable Enter the keyword enable to enable the challenge response authentication for SSHv2.
Defaults Disabled.
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.11(0.0) Introduced on the S4810, S4820T, S3048–ON, S3100 Series, S4048–ON, S5000, S6000,
S6000–ON, Z9500, Z9100–ON, S6100–ON, S6010–ON, S4048T–ON, C9000, and MXL.
Usage Information
If both the challenge response authentication and password authentication methods are configured, the challenge
response authentication takes priority.
Security 1499