configure remote access using sshv2 cisco packet tracer

Enable SSHv2 and the previously configured keypair with the following commands: router01(config)#ip ssh version 2 router01(config)#ip ssh rsa keypair-name routerXX.soundtraining.class(where XX is your router number) 7. Attempt to login to your router using the TeraTerm SSH client.

Full Answer

What is SSH in Cisco packet tracer?

By Tolga Bagci January 15, 2020 Cisco Packet Tracer 2 Comments SSH (Secure Shell) provides secure management of network devices. By using SSH, you establish a secure connection to a network device that you access, and your data is sent in encrypted form. How to Enable SSH in Cisco Router with Packet Tracer

How to configure SSH version 2 on a Cisco router?

SSH Version 2 configuration on a Cisco router IOS –. Step 1-. Configure Hostname and DNS Domain. hostname R1. aaa new-model. username Cisco password Cisco. ip domain-name Cisco.local. Step 2 –. Generate RSA key to be used. For SSH Version 2, the modulus size must be at least 768 bits. Step 3 – ...

How to configure sysnettech router with Packet Tracer?

First, run Packet Tracer and then create a network topology as shown in the image below. Add an additional Router to the workspace, because after configuration we will connect the Router to the Router with SSH. Open the CLI prompt by clicking on the SYSNETTECH Router and press Enter to skip the initial configuration.

How to enable SSH on the sysnettech router?

Add an additional Router to the workspace, because after configuration we will connect the Router to the Router with SSH. Open the CLI prompt by clicking on the SYSNETTECH Router and press Enter to skip the initial configuration. To enable SSH on the router, perform the following commands in order.

Does SSH work in Packet Tracer?

Configuring SSH on a router in Packet Tracer First build the network topology. Both the hostname and domain name will be used in the process of generating encryption keys. 3. Now generate encryption keys for securing the session using the command crypto key generate rsa.

What is SSH in Cisco Packet Tracer?

SSH (Secure Shell) is one of the most used protocols in network World. As a secured alternative of Telnet, SSH is always in the life of a network engineer. It helps us to connect our routers, swithces and any other network equipments. Especially because of SSH is more secure, it is always prefered more than Telnet.

What IOS commands are mandatory to enable sshv2 on a Cisco network device?

SSH Version 2 configuration on a Cisco router IOS –Configure Hostname and DNS Domain. hostname R1. aaa new-model. username Cisco password Cisco. ... Step 2 – Generate RSA key to be used. ip ssh rsa keypair-name sshkey. ... Step 3 – Enable SSH transport support for the virtual type terminal (vty) line vty 0 4.

Can I SSH into a Cisco router?

You have now learned how to configure the SSH server on your Cisco IOS router or switch and how to use the SSH client. SSH is a secure method for remote access to your router or switch, unlike telnet. SSH requires a RSA public/private key pair. SSH version 2 is more secure than version 1.

How do I enable SSH?

Activate or deactivate the SSH serversudo rm -f /etc/ssh/sshd_not_to_be_run sudo systemctl enable ssh sudo systemctl start ssh.sudo mv /etc/init/ssh.conf.back /etc/init/ssh.conf sudo start ssh.sudo systemctl stop ssh sudo systemctl disable ssh.sudo stop ssh sudo mv /etc/init/ssh.conf /etc/init/ssh.conf.back.

What does SSH stand for?

Secure ShellSSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an unsecured network.

What is the difference in line vty 0 4 and 5 15?

VTY lines are usually used for creating out-of-band management sessions to devices. If a password is not supplied on a vty line, that line cannot be used for managing the device. In some cases administrators may decide to let junior staff to use lines 0 - 4 and senior staff to use lines 5 - 15.

How do I SSH from command prompt?

You can start an SSH session in your command prompt by executing ssh user@machine and you will be prompted to enter your password. You can create a Windows Terminal profile that does this on startup by adding the commandline setting to a profile in your settings. json file inside the list of profile objects.

When using SSH to remote access a Cisco router can you see the terminal password Why or why not?

Cisco 5. When using SSH to remotely access a Cisco router, can you see the terminal password? Why or why not? No, because it is Linux based and they do not show the passwords so you are not able to even guess it.

What is Vty line in Cisco router?

The virtual terminal or “VTY” lines are virtual lines that allow connecting to the device using telnet or Secure Shell (SSH). Cisco devices can have up to 16 VTY lines. You can determine how many VTY lines you have by issuing “line vty 0 ?” from global configuration mode.

What port does SSH use?

port 22By default, the SSH server still runs in port 22.

Which type of access is secured on a Cisco router?

3. Which type of access is secured on a Cisco router or switch with the enable secret command? The enable secret command secures access to the privileged EXEC mode of a Cisco router or switch.

What is the difference between Telnet and SSH?

Telnet transfers the data in simple plain text. On other hand SSH uses Encrypted format to send data and also uses a secure channel. No authentication or privileges are provided for user's authentication. As SSH is more secure so it uses public key encryption for authentication.

What does transport input SSH do?

We can use the Cisco 'transport input' command to set which protocols are allowed to access the virtual terminal lines. We can choose from the following transport input command keywords to set the allowed protocols on the virtual terminal lines: ssh – allows TCP/IP SSH protocol only.

What port does SSH use?

port 22By default, the SSH server still runs in port 22.

What is the advantage of using SSH over telnet?

SSH operates faster than Telnet. SSH provides secure communications to access hosts. SSH supports authentication for a connection request.

What is SSH protocol?

The SSH protocol (Secure Shell) is a method for secure remote login from one device to other. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server. As discussed in another blog, SSH has two versions –

What is SSH v1?

SSH VERSION 1. SSH v1 (Secure Shell) provides an encrypted channel to users for logging into remote device. It provides strong host-to-host and user authentication. It also provides secure encrypted communications over the Internet.

Is SSH2 secure?

SSH Version2. On the contrary, SSH2 is a much more secured, an efficient version of SSH that includes SFTP , which is functionally similar to FTP with addition of SSH2 encryption. SSH works on port 22. It is a secure alternative to the non-protected login protocols (such as Telnet) and insecure file transfer methods (such as FTP ).

How to skip initial configuration in a SYSNETTECH router?

Open the CLI prompt by clicking on the SYSNETTECH Router and press Enter to skip the initial configuration.

What is SSH in security?

SSH (Secure Shell) provides secure management of network devices. By using SSH, you establish a secure connection to a network device that you access, and your data is sent in encrypted form.

How to configure R1 port?

To quickly configure the R1’s interface, double-click on it, click the Config tab in the window that opens, and then configure the Port Status option of the GigabitEthernet0/0 interface to On, then assign the IP address. To test whether SSH is running, open the PC1 prompt and establish a connection using the command below.

How many versions of SSH are there?

There are 2 versions of the SSH protocol. These; Version 1 and Version 2. SSH V1 exploits several patented encryption algorithms and is vulnerable to a well-known vulnerability that could allow an attacker to enter data into the communication flow.

Can you remotely manage a network device using SSH V2?

We recommend that you use SSH V2 as far as possible to remotely manage network devices.

How many steps are required to enable SSH on Cisco router?

There are four steps required to enable SSH support on a Cisco IOS router:

What is SSH authentication?

SSH uses either local security or the security protocol that is configured through AAA on your router for user authentication. When you configure AAA, you must ensure that the console is not running under AAA by applying a keyword in the global configuration mode to disable AAA on the console.

How to prevent non-SSH connections?

If you want to prevent non-SSH connections, add the transport input ssh command under the lines to limit the router to SSH connections only . Straight (non-SSH) Telnets are refused.

What does show ssh mean?

show ssh —Displays the status of SSH server connections.

What happens if you reject SSH?

If your SSH configuration commands are rejected as illegal commands, you have not successfully generated a 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 an RSA key pair and enable the SSH server.

What is SSH in a network?

Secure Shell (SSH) is a protocol which provides a secure remote access connection to network devices. Communication between the client and server is encrypted in both SSH version 1 and SSH version 2. Implement SSH version 2 when possible because it uses a more enhanced security encryption algorithm. This document discusses how to configure and ...

Can you test authentication without SSH?

Authentication Test without SSH. First test the authentication without SSH to make sure that authentication works with the router Carter before you add SSH. Authentication can be with a local username and password or with an authentication, authorization, and accounting (AAA) server that runs TACACS+ or RADIUS.

Objective

The objective of this lab is to configure the switch for remote management such that the laptop PC residing on a remote network be used to login and manage it via ssh . To accomplish this, the following will be done:

Implementation

The following configuration commands will the required to configure a Cisco switch for remote management. The commands used here a for the lab represented in the network topology used here. However, the solution can be achieved in many different ways.

Verification

To verify that I have configured the Cisco switch for remote management via ssh, I try to access the switch using the laptop on the network 192.168.0.0/24 using ssh. Remember that both the laptop and the switch are on different networks. See the result below.

What command is used to restrict remote access to a router?

We’ll use the transport input ssh command under the VTY section to restrict remote access using SSH only. Note that we can also use Access-lists to restrict SSH connections to our router:

Why is the password command not used in VTY 0 4?

Note: the password command used under line vty 0 4 section is completely optional and not used in our case because of the login authentication default command which forces the router to use the AAA mechanism for all user authentication.

What is SSH port?

Secure Shell (SSH) provides a secure and reliable mean of connecting to remote devices. It’s an encrypted network protocol that allows users to safely access equipment via command line interface sessions. SSH makes use of TCP port 22 which’s assigned to secure logins, file transfer and port forwarding.

Is telnet a security risk?

This will ensure that insecure services such as Telnet cannot be used to access the router. Telnet sends all information unencrypted, including user name/password, and is therefore considered a security risk.

Does Cisco router support SSH?

The first step involves examining whether your Cisco router’s IOS supports SSH or not . Most modern Cisco routers support SSH, so this shouldn’t be a problem.

Scenario

The network administrator has asked you to prepare RTA and SW1 for deployment. Before they can be connected to the network, security measures must be enabled.

Step 2: Configure Basic Security on the Switch

Configure switch SW1 with corresponding security measures. Refer to the configuration steps on the router if you need additional assistance.

Introduction

Prerequisites

Test Authentication

• Authentication Test without SSH
  First test the authentication without SSH to make sure that authentication works with the router Carter before you add SSH. Authentication can be with a local username and password or with an authentication, authorization, and accounting (AAA) server that runs TACACS+ or RADIUS. (Auth…
• Authentication Test with SSH
  In order to test authentication with SSH, you have to add to the previous statements in order to enable SSH on Carter and test SSH from the PC and UNIX stations. At this point, the show crypto key mypubkey rsacommand must show the generated key. After you add the SSH configuration, …

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Optional Configuration Sets

Debug and Show Commands

Sample Debug Output

Tips