Vty cisco what is

Communities: Chinese Japanese Korean. All Rights Reserved. The Cisco Learning Network. View This Post. Note: the show running-configuration command does not need to be executed from enable mode. Set an encrypted enable password with the following command from enable mode:.

Just like the enable password, other passwords are stored by default as unencrypted and could be viewed by issuing the show running-configuration command. Also, you may be storing Cisco configurations somewhere on your network and if you do, others might be able to access this and view your passwords if they are not encrypted. It is important to make it a practice to encrypt all passwords on the device.

One command can encrypt the rest of the passwords and is as follows:. However, this command encrypts the passwords using a rather weak algorithm, type 7 that can be reversed to reveal the password.

This link provides a Perl script that will decrypt type 7 passwords. Because of this, an alternative to type 7, called type 5 encryption is available. This article presented you with three basic things you can do to better secure access to your Cisco devices. They are 1 Set passwords for all methods of access, 2 Encrypt the enable mode password, and 3 Encrypt passwords stored in the configuration.

Remember that this is only a basic step but an important one. Look for further articles on Cisco information security to better protect your networking equipment.

How do I decrypt Cisco Passwords? Contact us today and bring your security to the next level. VTY lines are widely used to create out-of-band device management sessions. If a line does not have a password, that line cannot be used to manage the device. In some cases, administrators may choose to allow junior staff to use line 0 4 and managers to use line 5 The term vty stands for Virtual Teletype.

The summary 0 - 4 means that the device can allow 5 simultaneous virtual connections, i. Telnet or SSH. In a sense, we can say that 5 are connection ports to the router or switch. This is a type of zone command, we specify a zone with vty virtual terminal line from 0 to 15 ie every 16 lines. New password command to enter the password to be used for authentication. This also allows Telnet access to this device. Set the vty 0 4 command line on the router. Enter the password with the password command.

In order to enable password checking at login, issue the login command in line configuration mode. In this example, the AUX port is on line Issue these commands in order to configure the router AUX line:. Examine the configuration of the router in order to verify that the commands have been properly entered:.

To enable authentication, authorization, and accounting AAA authentication for logins, use the login authentication command in line configuration mode.

AAA services must also be configured. See Configuring Authentication for additional information. From the privileged EXEC or "enable" prompt, enter configuration mode and enter the commands to configure the router to use AAA services for authentication:.

Switch to line configuration mode using the following commands. To test this particular configuration, an inbound or outbound connection must be made to the line.

See the Modem - Router Connection Guide for specific information on configuring async lines for modem connections. Alternately, you can configure one or more VTY lines to perform AAA authentication and perform your testing thereupon.

Before issuing debug commands, see Important Information on Debug Commands. To troubleshoot a failed login attempt, use the debug command appropriate to your configuration:. Skip to content Skip to search Skip to footer. Available Languages. Download Options. Updated: December 17, Contents Introduction. Troubleshoot User-specific Password Failure. Introduction This document provides sample configurations for configuring password protection for inbound EXEC connections to the router.

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