Setting up SSH

By | June 8, 2020

To enable secure access to your Cisco device, you can use SSH instead of Telnet. SSH uses encryption to secure data from eavesdropping.

To enable SSH, the following steps are required:

1. set up a hostname and and a domain name.
2. configure local username and password.
3. generate RSA public and private keys.
4. allow only SSH access.

The following example shows the configuration of the first three steps:

ssh first three steps

First, we have defined the device hostname by using the hostname R1 command. Next, we have defined the domain name by using the ip domain-name cisco command. After that, the local user is created by using the username study password ccna command. Next, we need to enable only the SSH access to a device. This is done by using the transport input ssh command:

ssh fourth step

If we use the transport input ssh command, the telnet access to the device is automatically disabled.

NOTE
You should use the more recent version of the protocol, SSH version 2. This is done by using the ip ssh version 2 global configuration command.

Prerequisites for 200-301

200-301 is a single exam, consisting of about 120 questions. It covers a wide range of topics, such as routing and switching, security, wireless networking, and even some programming concepts. As with other Cisco certifications, you can take it at any of the Pearson VUE certification centers.

The recommended training program that can be taken at a Cisco academy is called Implementing and Administering Cisco Solutions (CCNA). The successful completion of a training course will get you a training badge.

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