How to Configure SSH on a Cisco Router

Data transfer through communication between several computers is one of the important topics in the third millennium, which has its complexities and issues. A computer network is created whenever two or more computer systems can exchange information through a multimedia cable, optical cable, or wirelessly. But creating a network is not simple and includes several different and sensitive parts. For example, For the remote connection between the server and the user, there are several Internet and network protocols, and in this post, we will introduce you to how to set up SSH in Cisco.

The SSH protocol is one of the most well-known network protocols developed in 1995 (equivalent to 1375 AD) and is now widely used in wireless (remote) networks. In terms of security, SSH significantly secures the exchange of information by encrypting it.

What is the SSH protocol or Secure Shell?

The word SSH is an abbreviation of Secure Socket Shell or Secure Shell, an internet protocol that means secure shell that enables data exchange using a secure channel. SSH1 and SSH2, the two main versions of this protocol, were initially created on Unix and Linux systems to access shell accounts and are considered a suitable alternative to Telnet and other insecure remote communication shells.

SSH is a widely used software method designed to access the network with the highest level of security. The SSH protocol initially encrypts the data sent from the computer to the network and automatically decrypts again when it reaches the destination.

One of the advantages of setting up SSH is that the end user is not involved in the encoding and decoding process, and all steps will be done invisibly. But the security of the SSH protocol is guaranteed by using modern and complex algorithms, and therefore it is used in many super-sensitive and critical systems.

Setting up SSH on Cisco

Cisco is the largest and most reliable company producing network and communication equipment in the new era. This multinational company, headquartered in Silicon Valley, California, USA, is active in designing, selling, and producing hardware related to networks and telecommunications. The founders of Cisco Holding are pioneers of the local area network or LAN for connecting computers through routers.

After configuring their router or switch, users need to establish remote access to connect to the device if needed for reconfiguration or troubleshooting. Suppose you have configured several systems or devices at the macro level – city, province, and even country – and then you need to provide support services to your subscribers. If you don’t have remote access to these devices, you’ll have to go a long way to get access to them to address your subscriber’s issues. To facilitate the configuration and troubleshooting process, Cisco uses Telnet and SSH protocols, which provide more security than Telnet.

Comprehensive training of Cisco (Cisco) – click

Step by step with setting up SSH on Cisco

Protocols such as Telnet are needed to configure Cisco routers and switches. This protocol has been the most used in the past, and its use is decreasing due to the greater security of SSH. In Telnet, an outsider can access the information exchanged between the network and the network administrator’s device. All the data in this protocol can be seen, and even the password, switch, and router settings can be heard and copied.

By setting up SSH in Cisco, the problem of intrusion by unauthorized people and devices is completely solved because all information is transferred between the server and the client in code. The switch settings are also done through private keys.

Before setting up SSH on Cisco, you need to ensure the version of iOS – the Cisco switches and routers operating system. The operating system must support SSH protocol encryption; If the K9 statement is present in the iOS server file, you will have no problem setting up SSH on Cisco.

#Show Version command is used to check the operating system version used by the router and switch:

To set the Hostname on the Cisco router, follow the steps below.

The importance of addressing network security issues before setting it up

If we say that network security issues are more important than implementation issues, we are not saying anything wrong. Network security includes all the rules and policies adopted by the network management, whose purpose is to prevent unauthorized access and limit the available resources in the network.

Infiltrators, who we know as hackers, make the best use of the lack of familiarity of users and employees of organizations and enter the network using any trick and ultimately cause disruption and manipulation of information. As the growth of the Internet and data transfer through this huge network increases, the need to have a secure network will increase. Network security generally provides a suitable and protected platform against intruders (or hackers).

To establish complete security in computer networks, the network technician must be an expert in the following matters:

  • Knowing the types of hacking and their countermeasures
  • In testing the network in practice under a load of malicious attacks
  • Full understanding of cryo control for network protection
  • Full understanding of the security of wireless networks (remotely)

Common methods of hacking in the network

Daily, hackers attack a large number of people by embedding various methods. The volume of information on the Internet has increased so much that not paying attention to security issues can cause a fatal blow to individuals, organizations, and businesses. It is important to know the most important hacking methods to create security.

A phishing attack is one of the most common internet attacks that cause the theft of users’ important information. Phishing is considered a type of forgery; instead of entering their information into the right platform, people go in the direction that hackers have in mind. Here are some other common methods used by hackers to access users’ information on the computer network:

  • Hacking through batch files
  • Hacking through keyloggers
  • Hacking through phishing attacks
  • Hacking by creating fake pages
  • Getting hacked through phishing emails

Comprehensive network security training

To provide a safe platform for users in computer networks, the network technician must be familiar with the types of networks, network goals, common methods of hackers to attack networks, and other network-related issues. To be able to work in network security – in today’s highly competitive market – you must acquire sufficient knowledge and experience. Participating in various courses gives you everything you need about network security.