Madun's files

Hello guys! Now we meet again to improve our knowledge of network security. I would like to introduce you security method for block brutt force hecking trial. Before I configure the router, I would like to give you know Brutt Force hecking method. Brutt force is hecking method that try to input every combination username or/and password one by one until it can open the security. For example, if we secure our router with password cisco, than there is someone/hecker try to attack our router with brutt force. He will try to enter any passowrd one by one form a, b, c, ab, de, 12f, etc until it find right combination ‘cisco’. How many time is, how long is, he will try to input every single possible password could be. Don’t think the Hecker tries to input it manually, of course not, he will make program and run the program to do so. To protect our network from this kind of attack, we can limit amount of login trial for everyone. For example, we limit for three attempts and block a...

In Cisco IOS, there are two type of standar security password and secret. The difference of the two are encryption. When you check running config, you can differ that passwod is plaintext and secret is encrypted. In other hand, cisco gives facility too encrypt this plaintext security uses service password-encryption command. Try to follow the instruction router#configure terminal router(config)#service password-encryption But, you have to know that people out there have known the secret of this encryption. They can copy the password and then paste to crecker and it can unecrypt the password. So be carefull to choose standard security. Thanks to sources: dancourses