As covered in my old post, to enable SSH on the ASA, we’ll need to generate RSA key pair first. Current NIST recommendation is to use 2048-bit or above. In this post, I am going to use 4096-bit key pair. ASA5506(config)# crypto key generate rsa modulus 4096 SSH Version. Configuring the Cisco ASA SSH server to accept only version 2 is best. May 23, 2017  Once you set the host name and domain-name (ip domain-name whatever), you simply do (in configuration mode) a 'crypto key gen rsa 2048' (or whatever you want the key length to be).I have one 3750 which doesn't have the right feature set for ssh (which I will get around to updating) so check that there is a k8 or k9 in the image name. Crypto key generate rsa. cryptokeygeneratersa,page2 Cisco IOS Security Command Reference: Commands A to C, Cisco IOS XE Release 3SE (Catalyst 3850 Switches).

Configuration of SSH on Cisco Switch in Packet Tracer 2019

This Article is about the configuration of SSH on Cisco Switch. You can configure SSH on Cisco devices very easily using these simple steps:

Cisco Generate Ssh Key

1. Crate a Packet Tracer Topology Lab
2. Basic IP Setting for connectivity
3. Set hostname and domain-name on Switch
4. Set console and enable password for SSH login
5. Generate the RSA Keys
6. Setup the Line VTY configurations
7. Create the username password for SSH access from PC
8. Verify SSH access

For the configurations of SSH in packet tracer on Cisco switch, you are required to follow the above steps. Let start and perform these steps one by one. (Learn what is PSSH)

Crate a Packet Tracer Topology Lab

Our first step is to open the packet tracer and need to create a simple lab. For this topology we will use only one switch and a PC. Simply drag these two items on dashboard. Now we will connect them with straight through connection.

Basic IP Setting for connectivity

The next step is assign the suitable IP setting to these devices. For keeping it simple and making basic connectivity we will assign just two IP address to these device. We will assign the IP address to PC. For this will open the PC setting and then IP configuration. Here we will assign an IP address to host, in our case we are going to assign it 192.168.1.1 with the default gateway. For default gateway we will assign the IP address 192.168.1.10. We assign the second IP address to our Vlan1 interface on switch. And its IP address will be the gateway of host that is 192.168.1.10. For this we will use the basic commands.
Switch> enable

Switch# config t

Switch(config)#interface vlan 1

Switch (config-if)# ip address 192.168.1.10 255.255.255.0

Switch (config -if)#no shut

Once you done with basic IP setting, you can verify the connectivity by pinging the interface vlan1 IP from host.

Set host-name and domain-name on Switch

For SSh configurations you need to configure a host-name and domain-name for your switch you can do this with these simple commands.

Switch # config t

Switch (config)#hostname SW1

SW1 ( config)#ip domain-name w7cloud.com

Set console and enable password for SSH login

For SSH access it is required that you must configure the console and enable password on your cisco switch. You can set these two passwords with following commands.

SW1 ( config)#line console 0

SW1(config-line)#password cisco

SW1(config -line)#logging synchronous

SW1(config- line)#login local

SW1 (config- line)#exit

SW1 # enable secret cisco

Generate the RSA Keys

Your Cisco switch must have RSA keys that for the SSH process. You can generate the RSA keys with following command:

SW1 ( config)# crypto key generate rsa

How many bits in the modulus [512]: 1024

% Generating 1024 bit RSA keys, keys will be non-exportable…[OK]

Set the size of key to 1024 bits.

If your Cisco Switch is running an older version of Cisco IOS image, then it is extremely recommended that you upgrade to latest Cisco IOS.

Setup the Line VTY configurations

For the configuration of SSH on cisco switch you need the following line vty configurations, and input transport is required to set to SSH. Set the login-to-local, & password to 7.

sw1 ( config)#line vty 0 4

sw1 ( config-line)#transport input ssh

sw1( config -line)#login local

sw1(config- line)#password 7

sw1(config- line ) #exit

Create the username password for SSH access from PC

If you do not have a username for SSH access you need to create a username. You can do it with this simple command:

Sw1# config t

sw1 (config ) # username w7cloud password cisco

Make sure the password encryption services is enabled on your switch, this service will encrypt your password, & when you do “sh run”, you’ll see only the encrypted password, not clear text password.

SW1# service password-encryption

Cisco Crypto Key Generate Rsa Command

Verify SSH access from Host

Once you done with the above configurations you can test all these configuration by creating a SSH connection from Host. You do it the command ssh –l <username> <IP address>. Open the host command prompt and use the command

Generate A Rsa Crypto Key

C:>ssh -l waqas 192.168.1.10

It will ask for password, provide the password that you created with this username in previous steps. Then it asked for console password and then you need to provide the enable password. Now you are in your Cisco switch. You can perform switch configurations from your host.

From the switch, if you use the command ‘sh ip ssh’, it will also confirm that SSH is enabled on this cisco swith.

Windows 8.1 pro product key online generator. For better understanding please watch the video and like it.

I hope this will be a helpful for you, please share your comments. If you like this then share this on social media. Thank you for reading this.!

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