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ccna uk jobs.Exam Essentials If you do not configure a user EXEC password and a privileged EXEC password. you will not be able to access the IOS device remotely via Telnet or SSH by default.1. password encryptionFor unencrypted passwords, you can encrypt them using the global configuration mode service password-encryption, but the command enable secret has a higher encryption strength than the command service password-encryption. Practical experienceIt is recommended that you do not use the command enable password (or username password ) in combination with service password-encryption, because there are several tools available on the Internet for breaking this encryption. Simply search for them in a search engine using Cisco password cracker and you will find many such tools. Also, the MD5 hash encryption used for the keyword secret can be cracked with a password cracker like Cain andAbel or LOphtCrack, given enough time. If someone steals your configuration file, you will likely suffer an access attack. Therefore, the best defense is to disable anyone from accessing your configuration file.Video 10.11 A multimedia demonstration of configuring passwords on an IOS device is included in the companion digital resource to this book.To restrict access to user EXEC mode, use the command password; to restrict access to privileged EXEC mode, use the command enable password or enable secreto Don't forget that the command enable secret encrypts the password: this is and will be the case. For VTY access, you must also configure the command logino in line subconfiguration mode Use the command service password-encryption to encrypt plaintext passwords, which includes passwords configured for VTY and other lines using the command password, passwords configured by the command enable password, and other commands configured This includes passwords configured with the command password for VTY and other lines, passwords configured with the command enable password, and other commands.10.5.3 Login FlagsA login banner can be configured on the IOS device to display a message to all users when they attempt to enter user EXEC mode. The command banner motd is used to create a login banner.IOS(config)# bannermotd delimiting_char your_banner delimiting_char IOS(config)#motd (message of the day) is borrowed from UNIX. After the command banner motd, you must specify a delimiter, which identifies the beginning and end of the banner One character cannot appear in the banner. When the separator is specified, when the IOSCLI parser sees it in the text, it knows that the banner ends here, and the CLI prompt is redisplayed. Pressing the Enter key when specifying a flag does not terminate the flag, so the flag can contain multiple lines of content. To end the flag, enter the previously specified separator. The following is an example of a login flag configuration.