Cisco CCNA Certification Training Case Study: The impact of multiple passwords access router

Your commitment CCNA certification exam must practice with various types and Password to know how to configure a Cisco router - but the CCNA exam success and networks to thrive in the real world must also know how to inspect a Cisco router configuration to determine the degree of network security, which is already available. After all, most routers allow you to work your password already set, and it is up to you whether the password is givenJob.

We begin with a Telnet password. Telnet passwords are configured on the VTY lines, and no telnet access is enabled by default on a Cisco router through. If you saw the following configuration, what does this mean?

line vty 0 4

Privilege level 15

Password Baseball

Access

The configuration of Cisco router with three small things - first, Telnet access is enabled. Second, the password is baseball. Thirdly, the "privilege level" command 15means that any user who knows Telnet attempts to the router and the password will automatically be privileged EXEC mode. (If this command were not present, the user may be put into user exec and then before the privileged EXEC password may be required.)

You may not want to give the level of access to all incoming Telnet connections. If you have "client router in a room and saw this configuration of a router, what it meansYou?

Username Password Halas Bears 0

Username Password Ewbank Jets 0

Username password privilege and 0 15 McDaniel

line vty 0 4

Local Login

This configuration means three things. Any user attempting to telnet to ask for both a username and password. Each user must enter the password assigned to them. For example, the user "Halas" had to enter the password "bear" telnet successfully in this router.The command "login local" under the VTY lines means that the local database of usernames and passwords used for authentication.

Again, by default, users are telnet to be put into user exec mode by default. Only users with "privilege 15" in their midst username / password in privileged EXEC definition will be placed immediately after login.

Note that zero in each of the statements username and password? I am but when I configured thisStatements. This figure shows the level of password encryption is currently zero is the lowest level of encryption, indicating that the passwords are not encrypted at all. There is only one line on top of the configuration of a Cisco router, indicating the reason .. Which of these three is?

timestamps debug uptime service

Service timestamps log uptime

No service password-encryption

Pretty easy! The password encryption service is disabled by default.To turn it on. just run the command service password-encryption. Let's do it here and then look at the configuration.

R1 (config) # service password-encryption

Forgot your username Halas 1415170A1E17 7

Username Password 070524585D Ewbank 7

Forgot your username privilege 15 7 082C4F4A08170C121E and

Well, this is what I call encryption! Note that the last zero to a "7" - which is the highest level of encryption on a Cisco router, and it seems, isvery effective.

Know how to configure a Cisco router to read is a valuable skill for both the CCNA certification exam and work with production networks. Practice, continue studying, and you have the letters area "CCNA" behind your name soon!

Visit : MP3 Player freedesignsoftware