YouTube » tics and cynics, even then, it is that on

CCNA Certification Exam Training: Passwords nike air max 98 gundam italia , Cisco Routers, And Network Security Computers Articles | November 18, 2006

Network security starts with the basics, and in this CCNA certification exam training article, I'll show you how to configure basic password security on a Cisco router.



CCNA certification is important, and so is securing our network's Cisco routers! To reflect the importance of network security, your CCNA certification exam is likely going to contain a few questions about the various passwords you can set on a Cisco router. Let's take a look at some of those passwords and when to apply them.


If the previous user has logged out of the router properly, you will see a prompt like this when you sit down at the router console:


R1 con0 is now available


Press RETURN to get started.


R1>


To get into enable mode, by default all I have to do is type "enable".


R1>enable


R1#


See how the prompt changed? By default, I can now run all the show and debug commands I want, not to mention entering global configuration mode and doing pretty much what I want. It just might be a good idea to password protect this mode! We do so with either the enable password command or the enable secret command. Let's use the enable password command first.


R1(config)#enable password dolphins


Now when I log out and then go back to enable mode - or try to - I should be prompted for the password "dolphins". Let's see what happens.


R1>enable


Password:


R1#


I was indeed prompted for a password. Cisco routers will not show asterisks or any other character when you enter a password; in fact, the cursor doesn't even move.


The problem with the enable password command is that the password will show in the configuration in clear text, making it easy for someone to look over your shoulder and note the password for future use, as shown below:


hostname R1


!


enable password dolphins


We could use the "service password-encryption" command to encrypt the enable password, but that will also encrypt all the other passwords in the Cisco router config. That's not necessarily a bad thing! Here's the effect of this command on the enable password we set earlier.


enable password 7 110D1609071A020217


Pretty effective encryption! However, if we want to have the enable password automatically encrypted, we can use the enable secret command. I'll use that command here to set this password to "saints", and note that I'm not removing the previous enable password.


R1(config)#enable secret saints


After removing the "service password-encryption" command, we're left with two enable mode passwords, and they appear in the Cisco router config like this:


enable password dolphins


enable secret 5 $1$kJB6$fPuVebg7uMnoj5KV4GUKI


If we have two enable passwords, which one should we use to log into the router? Let's try the first password, "dolphins", first:


R1>enable


Password:


Password:


When you're prompted for the password a second time, you know you got it wrong the first time! Let's try "saints":


R1>enable


Password:


Password:


R1#


When both the enable secret and enable password commands are in use on a Cisco router, the enable secret password always takes precedence. "dolphins" didn't get us in, but "saints" did. That's valuable information for both the CCNA certification exam and real-world networks, because there's no worse feeling than typing a password at a Cisco router prompt and then getting another password prompt!


This is just one way to perform basic Cisco router security with passwords. We'll take a look at other methods in a future CCNA certification exam training tutorial!

Article Tags: Ccna Certification Exam, Certification Exam Training, Enable Password Command, Ccna Certification, Certification Exam, Exam Training, Cisco Routers, Network Security, Enable Mode, Enable Password, Password Command, Enable Secret, Password Dolphins, R1>enable Password, Cisco Router


The subject of the psychics and their special powers has existed since time immemorial and has been the core subject matter of countless books, movies and TV programmes.


Though the world today is filled with skeptics and cynics, even then, it is that one subject that has maintain its popularity and has kept people’s interests rooted to the spot.


Why is the fascination around being a psychic?


There are various factors behind people’s fascination for psychics. Generally the fascination stems from the belief that these individuals are gifted and can hel