Administrator Guide

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 EMC
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.
ip ssh connection-rate-limit
Configure the maximum number of incoming SSH connections per minute.
Syntax
ip ssh connection-rate-limit 1-60
Parameters
1-60 Enter the number of maximum numbers of incoming SSH connections allowed per minute.
The range is from 1 to 60 per minute. The default is 10 per minute.
Defaults 10 per minute
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC
Networking OS Command Line Reference Guide.
Version Description
9.11(0.0) Increased the SSH rate–limit range.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100-ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
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.
pre-6.1.1.0 Introduced on the E-Series.
Security 1401