After the above configurations, connect from a remote computer to verify that you can ssh to this Cisco switch. First, we set the hostname of the device using the hostname R1 command. Next, we defined the domain name using the Cisco ip domain-name command. After that, the local user is created by using the user name study password ccna command. Then, simply enable SSH access to a device. This is done with the ssh transport input command: Test authentication without SSH first to make sure authentication with the Carter router works before adding SSH. Authentication can be performed with a local username and password or with an authentication, authorization and accounting (AAA) server running TACACS+ or RADIUS. (Authentication using the line password is not possible with SSH.) This example shows local authentication, which allows you to telnet access the router using the Cisco user name and password. Running sh ip ssh from the switch confirms that SSH is enabled on this Cisco device. Friends I found to disable SSH from Cisco device in general, we do not use before every command to remove this perticular command, Note that if you use the command „do not generate RSA crypto key”, it will not work, but the device will suggest you to use the command „Cancel RSA crypto key”, amazing…..!!!!!!!!!! @JOHN:- You can choose yourself. Hi, my question is that after enabling SSH on a Cisco device, how to disable SSH? Full message very user, thanks for sharing. BDY, if you can also describe how to use Telnet and ssh online vty itself, it will show me gr8 ip ssh Displays version and configuration data for SSH. To demonstrate SSH, I will use the following topology: Test to make sure that non-SSH users cannot telnet to the Carter router.

René`s example applies SSH to the VTY line. This means that you can connect to the device via SSH from any of its interfaces to VTY connections. In your configuration, you link the ssh configuration only to the administration interface. This is, of course, a legitimate setup, as long as you only apply out-of-band management, and if it works for you, that`s great. SSH has been introduced in these Cisco IOS platforms and images: The PuTTY client does not need the username to initiate the SSH connection to the router. This screenshot shows that the PuTTY client connects to the router and asks for the username and password. The login banner is not displayed. You must use the hostname global configuration command to configure a hostname for the router.

myswitch#configure terminal myswitch(config)#line VTY 0 15 myswitch(config-line)#Transport SSH preferred And create an authentication list that points to the local user database SSH (Secure Shell) is a secure method for remote access, just like authentication and encryption. An RSA public/private key pair is used for this purpose. At this point, the show crypto key mypubkey rsa command should display the generated key. After adding the SSH configuration, test whether you can access the router from the PC and UNIX station. Support for SSH version 2.0 (SSH v2) has been introduced in Cisco IOS platforms and images begin in Cisco IOS Software Release 12.1(19)E. This document describes how to configure and debug Secure Shell (SSH) on Cisco routers or switches running Cisco IOS software®. Thanks Lazaros, all this makes sense, no need to bind a port if you can use a virtual interface accessible from any port. I will try if I have the opportunity. Weak. The RSA key pair name is the hostname and domain name of the router.

Let`s configure a hostname: If your SSH configuration commands are rejected as invalid commands, you have not generated an RSA key pair for your router. Make sure you have specified a host name and domain. Then use the crypto key generate rsa command to generate RSA key pairs and enable the SSH server. Warning: This command cannot be cancelled after saving the configuration. In addition, after you delete RSA keys, you cannot use certificates, use the CA, or participate in certificate exchanges with other IP Security (IPSec) peers unless you regenerate the RSA keys to reconfigure CA interoperability, obtain the CA certificate, and request your own certificate again. Type this command to SSH from the Cisco IOS SSH (Reed) client to the Cisco IOS SSH (Carter) server to test this: Router(config)#aaa new Router(config) template#aaa Login authentication Standard local router (config)#line vty 0 15 Router(line-configuration)#transport SSH entry version 2 supports the login banner. If the SSH session is initiated with the Cisco router, the login banner is displayed when the SSH client sends the user name. For example, if the SSH Secure Shell client is used, the login banner is displayed. If the PuTTY ssh client is used, the login banner is not displayed. This is because SSH sends the default username and PuTTY does not send the default username. Probably the most common SSH client is putty. The only thing you need to do is select the SSH protocol, enter the IP address, and leave the default port at 22: In the following example, the management IP address in VLAN 101 is set to 192.168.101.2.