configure ssh to secure remote access with the following settings

Configure SSH to secure remote access with the following settings: Domain name of cisco.com; RSA key-pair parameters to support SSH version 2; Set SSH version 2; User admin with secret password ccna; VTY lines only accept SSH connections and use local login for authentication; Configure the port security feature to restrict network access:

Full Answer

How to configure SSH to remotely access a Cisco router or switch?

Step 1: First step in configuring SSH to securely access the CLI interface of a Cisco Router or Switch remotely is to create a local user database for user authentication. Follow these steps to create a local user with username "jajish" and password as "OmniSecuPass" and with a privilege level 15.

How do I configure an SSH server for RSA based authentication?

Complete these steps in order to configure the SSH server to perform RSA based authentication. Specify the Host name. Define a default domain name. Generate RSA key pairs. Configure SSH-RSA keys for user and server authentication. Configure the SSH username. Specify the RSA public key of the remote peer. Specify the SSH key type and version.

How to configure SSH to use local username and password?

But here we configure ssh to use local username and password. Configure the router to accept only ssh connection with “ transport input ssh ” command. Configure ssh to version 2 using “ IP ssh version 2 ” and set the authentication times to 3 with “ IP ssh authentication-retries 3 ” command.

How do I secure SSH on my server?

That can be a single IP address, an IP range, or a hostname: sshd : 10.10.0.5, LOCAL. Make sure to keep your log in information secure at all times and to apply security at multiple layers. Use different methods to limit SSH access to your servers, or use services that will block anyone who tries to use brute force to gain access to your servers.

What is SSH in Cisco switch?

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. Make sure you have an IOS image that supports crypto features, otherwise you can't use SSH.

Which of the following commands will you use to enable SSH version 2 for login?

Steps to configure SSH: Configure the router hostname using command “hostname”. Configure the domain name using command “ip domain-name”. Generate public and private keys using command “crypto key generate rsa”. Create a user in the local database using command “username…

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.

Which two steps are required before SSH can be enabled on a Cisco router?

Cryptography.Cryptographic hash function.

What is SSH configuration?

ssh/config – is the user-specific/custom configuration file. It has configurations that apply to a specific user. It therefore overrides default settings in the system-wide config file. This is the file we will create and use.

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 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 feature of SSH makes it more secure?

SSH makes it possible to bypass password protection on critical servers when a user logs in from a host that has authenticated itself by sharing a public key and a signature using the associated private key.

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.

What three configuration steps must be performed to implement SSH access to a router choose three?

CCNA Sec V2QuestionAnswerWhat three configuration steps must be performed to implement SSH access to a router? (Choose three.)a user account an IP domain name a unique hostnameThe is a Layer 2 open standard network discovery protocol.LLDP142 more rows

Which three commands are used to set up secure access to a router through a connection to the console interface choose three?

interface fastethernet 0/0line vty 0 4line console 0enable secret ciscologinpassword ciscoExplanation:The three commands needed to passwordprotect the console port are as follows:line console 0password ciscologinTheinterface fastethernet 0/0command iscommonly used to access the configurationmode used to apply ...

What is the purpose of using SSH to connect to a router?

It allows a secure remote connection to the router command line interface. It allows a router to be configured using a graphical interface.

Which command is used to generate SSH keys?

ssh-keygenAn SSH key can be generated by running the “ssh-keygen” command in the terminal. It will ask you to enter the file name in which you want to save the private and public key, or you can go with the default selected files “id_rsa” and “id_rsa.

What is the difference between SSH version 1 and 2?

The difference between SSH1 and SSH2 is they are two entirely different protocols. SSH1 and SSH2 encrypt at different parts of the packets, and SSH1 uses server and host keys to authenticate systems where SSH2 only uses host keys.

How do I check SSH version?

On Linux, we can use ssh -v localhost or ssh -V to check the OpenSSH version currently installed.

How many versions of SSH are there?

There are mainly two versions of SSH protocol. The initial version was SSH-1, which was released in July 1995. In 2006, IETF (Internet Engineering Task Force) published RFCs for a revised version of the SSH protocol SSH-2 as the standard. The two versions of SSH, SSH-1 and SSH-2 are not compatible.

Where is SSH configuration?

SSH server configurations can be made on the command line, per user, or system-wide through a file called SSH_config, which is typically located in /etc/SSH/SSHd_config.

How to use SSH?

You can use SSH for several activities that require a secure, remote connection to another device, such as: 1 Secure file copy between a client and server 2 Redirect network protocols over a secure tunnel 3 Interactive command-line utility for remote management

What is SSH authentication?

SSH provides authentication and encryption functions that enable you to configure your system to meet your security requirements. By default, SSH is configured for username and password authentication, but you can add public key authentication and additional multi-factor authentication (MFA) provided through other modules (like OATH-TOTP). Multi-factor authentication proves more resilient against phishing attacks than a password alone because MFA requires at least one other factor beyond a password to confirm an identity.

What is SFTP server?

SFTP is an extension of the SSH protocol and requires an additional SFTP server on the server-side. SFTP includes a more robust command set like listing remote directories and removing files, which SCP cannot do.

What is a PuTTY client?

PuTTY is a popular free SSH client and VanDyke Software's SecureCRT is a popular commercial client. You can use SSH for several activities that require a secure, remote connection to another device, such as: Secure file copy between a client and server. Redirect network protocols over a secure tunnel. Interactive command-line utility ...

What is SSH tunnel?

SSH also supports several other features like the ability to encapsulate other network traffic over an established SSH tunnel. For example, after you create an SSH tunnel, you could instruct a different app, like a web browser, to connect to your local host on a specific port. The system will then send subsequent network calls to a destination server. This allows remote connections to a network without exposing that service on the internet.

Can you copy files over SSH?

You can copy files over SSH using the Secure Copy Protocol (SCP) or Secure File Transfer Protocol (SFTP). Both copy files over TCP 22 but use different protocols. SSH handles the authentication and encryption. SFTP is an extension of the SSH protocol and requires an additional SFTP server on the server-side.

What is SSH client?

An SSH client is an application you install on the computer which you will use to connect to another computer or a server. The client uses the provided remote host information to initiate the connection and if the credentials are verified, establishes the encrypted connection.

What is needed to accept SSH connections?

In order to accept SSH connections, a machine needs to have the server-side part of the SSH software toolkit.

What is SSH?

Secure Shell, sometimes referred to as Secure Socket Shell, is a protocol which allows you to connect securely to a remote computer or a server by using a text-based interface.

How to get remote desktop on Windows 7?

You can find it in a couple of different ways: For Windows 7, click on Start -> All Programs, go to the ‘Accessories’ folder and click on Remote Desktop Connection.

What is the component of SSH?

On the server’s side, there is a component called an SSH daemon that is constantly listening to a specific TCP/IP port for possible client connection requests. Once a client initiates a connection, the SSH daemon will respond with the software and the protocol versions it supports and the two will exchange their identification data. If the provided credentials are correct, SSH creates a new session for the appropriate environment.

How to enable remote access in Windows 7?

Enabling Remote Access in Windows 7, 8, 10 and Windows Server Versions. Step 1: Allow Remote Connections. Step 2: Add Users to the List of Remote Users. How to Use the Remove Desktop Connection Client.

What is the protocol used to connect to a remote machine?

There are many ways to establish a connection with a remote machine depending on the operating system you are running, but the two most used protocols are: Secure Shell (SSH) for Linux-based machines. Remote Desktop Protocol (RDP) for Windows-based machines.

What is SSH client?

SSH ( SSH client) is a program for remotely accessing a machine, it enables a user to execute commands on a remote host. It is one of the most recommended method for logging in to a remote host, since it is designed to provide secure encrypted communications between two untrusted hosts over an insecure network.

What is loglevel in SSH?

LogLevel – defines the verbosity level that is used when logging messages from ssh. The allowed values includes: QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1, DEBUG2, and DEBUG3. And the default is INFO.

Can you use SSH with passwords?

By default, users are authenticated in ssh using passwords, however, you can setup ssh passwordless login using ssh keygen in 5 simple steps.

What is SSH on Cisco router?

The Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best-known example application is for remote login to computer systems by users.

What is SSH in network?

SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server. Common applications include remote command-line login and remote command execution, but any network service can be secured with SSH.

What is SSH protocol?

The SSH protocol is an encrypted protocol designed to give a secure connection over an insecure network, such as the internet.

When was SSH updated?

In 2006, the SSH protocol was updated from version 1 to version 2. It was a significant upgrade. There were so many changes and improvements, especially around encryption and security, that version 2 is not backward compatible with version 1. To prevent connections from version 1 clients, you can stipulate that your computer will only accept connections from version 2 clients.

Why is there a limit on the number of authentication attempts?

Defining a limit on the number of authentication attempts can help thwart password guessing and brute-force attacks. After the designated number of authentication requests, the user will be disconnected from the SSH server. By default, there is no limit. But that is quickly remedied.

What port does SSH listen to?

In its default configuration, an SSH server will listen for incoming connections on Transmission Control Protocol ( TCP) port 22. Because this is a standardized, well-known port, it is a target for threat actors and malicious bots.

What is SSH in Linux?

The SSH protocol is an encrypted protocol designed to give a secure connection over an insecure network, such as the internet. SSH in Linux is built on a portable version of the OpenSSH project. It is implemented in a classic client-server model, with an SSH server accepting connections from SSH clients. The client is used to connect ...

How to disable root login?

Disable Root Log Ins 1 If you want to prevent root from logging in at all, replace “prohibit-password” with “no”. 2 If you are going to allow root to log in but force them to use SSH keys, leave “prohibit-password” in place.

How to prevent root from logging in?

If you want to prevent root from logging in at all, replace “prohibit-password” with “no”.

What is SSH authentication?

SSH supports Authentication to reliably determine the identity of the connecting computer, encryption to scramble data so that only the intended recipient only can read it and Integrity to guarantees the data sent over the network is not changed by a third party. SSH has two main versions, SSH1 and SSH2.

What is SSH in network?

Network administrators must disable telnet and use only SSH wherever possible. SSH (Secure Shell) is a protocol which define how to connect securely over a network. SSH (Secure Shell) protocol provides the three main ideas of security authentication, confidentiality (via encryption) and integrity of data transfer over a network.

What port number does SSH use?

SSH uses TCP as its transport layer protocol and uses well-kown port number 22.

What is the default device name for RSA encryption?

Before generating RSA encryption keys, you must change the default hostname of a Cisco Router or Switch. The default device name of a Cisco Router is "Router" and default device name of a Cisco Switch is "Switch". You must configure a domain name also before generating RSA keys. Follow these Cisco IOS CLI commands to configure a hostname, ...

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.

Prerequisites

Test Authentication

Optional Configuration Sets

Debug and Show Commands

Sample Debug Output

Tips