Reference Guide

1314 | Security
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Command
History
ip ssh hostbased-authentication
c e s
Enable hostbased-authentication for the SSHv2 server.
Syntax
ip ssh hostbased-authentication enable
To disable hostbased-authentication for SSHv2 server, use the no ip ssh
hostbased-authentication enable command.
Parameters
Defaults
Disable by default
Command Modes
CONFIGURATION
Command
History
Usage
Information
If this command is enabled, clients can login without a password prompt. This provides two levels of
authentication:
• rhost-authentication is done with the file specified in the ip ssh rhostfile command
• checking client host-keys is done with the file specified in the ip ssh pub-key-file command
If no ip ssh rsa-authentication enable is executed, host-based authentication is disabled.
Related
Commands
ip ssh key-size
c e s
Configure the size of the server-generated RSA SSHv1 key.
Syntax
ip ssh key-size 512-869
Parameters
Defaults
Key size 768
Version 7.6.1.0 Introduced for S-Series
Version 7.5.1.0 Introduced for C-Series
pre-Version 6.1.1.0 Introduced for E-Series
enable Enter the keyword enable to enable hostbased-authentication for SSHv2 server.
Version 7.6.1.0 Introduced for S-Series
Version 7.5.1.0 Introduced for C-Series
pre-Version 6.1.1.0 Introduced for E-Series
Note: Administrators must specify the two files (rhosts and pub-key-file) to configure
host-based authentication.
ip ssh pub-key-file Public keys of trusted hosts from a file.
ip ssh rhostsfile Trusted hosts and users for rhost authentication.
512-869
Enter the key-size number for the server-generated RSA SSHv1 key.
Range: 512 to 869
Default: 768