Chapter 5 Configuring the Router

Performing the Initial Configuration on the Router

Configuring Virtual Terminal Lines for Remote Console Access

Virtual terminal (vty) lines are used to allow remote access to the router. This section shows you how to configure the virtual terminal lines with a password, so that only authorized users can remotely access the router.

The router has five virtual terminal lines by default. However, you can create additional virtual terminal lines as described in the Cisco IOS Terminal Services Configuration Guide, Release 12.4. See the Configuring Terminal Operating Characteristics for Dial-In Sessions section.

Line passwords and password encryption is described in the Cisco IOS Security Configuration Guide, Release 12.4. See the Security with Passwords, Privilege Levels, and Login Usernames for CLI Sessions on Networking Devices section. If you want to secure the vty lines with an access list, see the Access Control Lists: Overview and Guidelines. Also see the Cisco IOS Password Encryption Facts tech note.

SUMMARY STEPS

1.enable

2.configure terminal

3.line vty line-number [ending-line-number]

4.password password

5.login

6.end

7.show running-config

8.From another network device, attempt to open a Telnet session to the router.

DETAILED STEPS

 

Command or Action

Purpose

Step 1

 

 

enable

Enables privileged EXEC mode.

 

 

Enter your password if prompted.

 

Example:

 

 

Router> enable

 

Step 2

 

 

configure terminal

Enters global configuration mode.

 

Example:

 

 

Router# configure terminal

 

Step 3

 

 

line vty line-number [ending-line-number]

Starts the line configuration command collection mode for

 

 

the virtual terminal lines (vty) for remote console access.

 

Example:

Make sure that you configure all vty lines on your

 

Router(config)# line vty 0 4

router.

 

 

Note To verify the number of vty lines on your router, use

 

 

the line vty ? command.

 

 

 

 

 

Cisco 1900 Series Hardware Installation

 

 

 

 

 

 

OL-19084-02

 

 

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Cisco Systems 1900 Series manual Starts the line configuration command collection mode for, Line vty ? command