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How to Enable SSH and Disable Telnet on Force10 S-Series Switches


The objective of this article is to enable a more secure remote access method, SSH, while disabling an insecure method of remote connection, Telnet, on Force10 S-Series Switches


To enable SSH, disabled by default, and to disable Telnet, enabled by default, complete the following:


1. Enable SSH via the CLI using a console or Telnet connection saving the configuration.

Dell>
Dell>en
Dell#
Dell#configure
Dell(conf)#ip ssh server enable
Dell(conf)#crypto key generate
Dell(conf)#exit
Dell#show ip ssh

SSH server : enabled.
SSH server version : v1 and v2.
Password Authentication : enabled.
Hostbased Authentication : disabled.
RSA Authentication : disabled.
Vty Encryption Remote IP

Dell(conf)#exit
Dell#copy running-config startup-config

File with same name already exist.
Proceed to copy the file [confirm yes/no]: y



2. Test remote access via SSH.

A. Open a terminal emulator program such as Putty
B. Enter the ip address of the switch in the corresponding box
C. Set the Connection type to SSH
D. Click on Open
E. Login to the switch via the CLI

Failure to test a successful login via SSH prior to disabling Telnet could result in the loss of remote access to the switch.


3. Disable Telnet and save configuration from a Putty session via SSH using the CLI.

Dell>
Dell>en
Dell#
Dell#configure
Dell(conf)#no ip telnet server enable
Dell(conf)#exit
Dell#copy running-config startup-config

File with same name already exist.
Proceed to copy the file [confirm yes/no]: y






Artikkel-ID: HOW10978

Dato sist endret: 06/04/2018 04:31 PM


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