Caution: This process requires use of the Command Line Interface (CLI). This process can be utilized through a serial or telnet session. However these steps must be followed in order to prevent unintentionally blocking access to remote management.
This procedure assumes:
The switch is already configured with an IP address and is reachable within the network.
There is an account created with Privilege Level 15. To verify this, use the command: console#show users accounts.
Note: After completing these steps, you can expect to receive errors about certificate authenticity. This is due to the certificates and keys being self-generated. This is not an error.
Caution: Before disabling either telnet or HTTP access, verify SSH or HTTPS access.
Note: If SSH or HTTPS is enabled and the disabling of telnet and HTTP is desired, skip to step 3 to disable telnet and step 5 to disable HTTP.
Connect to the switch via CLI
To enable SSH, enter the following commands:
console>enable
console#config
console(config)#crypto key generate rsa
console(config)#crypto key generate dsa
console(config)#ip ssh server
To disable telnet, enter: console(config)#no ip telnet server
Note: This system is capable of the generation and storage of 2 certificates. To generate the second key, replace the number 1 with 2. To activate the second key, use (config)#ip https certificate 2.
To disable HTTP, enter: console(config)# no ip http server
After verifying connectivity via SSH or HTTPS, save the configuration by entering: console#copy running-config startup-config
Step 1: Open control panel Step 2: Navigate to programs and features.Step 3: Click on "Turn Windows features on or off.Step 4: Disable "Telnet client"Step 5 : Click ok.
Step 1: Open control panel Step 2: Navigate to programs and features.Step 3: Click on "Turn Windows features on or off.Step 4: Disable "Telnet client"Step 5 : Click ok.
From the Basic Configuration menu, select SFTP. In the SFTP screen, to add an SFTP user and define a password, press Enter or the down key in Status for the user. Pressing the space bar key offers the option update or delete an existing user.
Click Group > Group Configuration. Click the Administration tab to open the Access panel. Enable or disable the GUI or CLI access options and network services.
To create VLANs, run the configure terminal command to edit the switch configuration, press enter. To create a single VLAN, use the interface VLAN command where X is the VLAN number, press enter. To create a range of VLANs, use the interface range vlan command followed by the VLAN numbers you want to add.
SSH (Secure Shell) provides a secure alternative to Telnet. SSH protects user identities, passwords, and data from network snooping attacks, and allows secure logins and file transfers.
Follow the below steps to resolve the misconfiguration. Comment out or remove any lines starting with telnet from /etc/inetd. conf and /etc/inetd. d/* . Set disable = yes on all telnet services in /etc/xinetd. conf and /etc/xinetd. d/* .
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