IOS devices can be protected using different types of passwords, depending on the type of access. Each password you configure should be complex and unique. The following passwords can be used on an IOS device:
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- In this post, we have learnt the different ways of setting a password on the Cisco router. Here we learned the security of Auxiliary Port, Console Port, Enable Mode protection in Router and also the security of Telnet on Router. Guys if you have doubt or any query with this post then don’t hesitate to contact me. And if you have any.
1. console password – by default, the console access does not require a password, so anyone with the phyical access to the device can acces the CLI. To configure a console password, use the following commands:
After the console password has been set, users will be forced enter the password to access the device through the console port:
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2. telnet password – the telnet access to an IOS device is disabled by default. You can enable it and require a password for telnet access using the following set of commands:
After the telnet password has been set, users accessing devices using telnet will be forced to provide the password:
3. aux password – many Cisco devices have an auxiliary (AUX) port that can be used for remote router management via modem. You can require users to enter the password before accessing the device this way:
4. enable mode password – you can configure an IOS device to require a password before entering the enable mode. This can prevent an unauthorized user from entering the global configuration mode and changing the configuration of the device. The configured password will be stored in encypted form. Here is the command:
The user will be prompted to provide the password when trying to access the enable mode:
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Note that all passwords on an IOS device, with the exception of the enable secret password, are stored in clear-text in the configuration files:
You can use the service password-encryption global configuration command to encypt the passwords:
Now, the passwords are stored in encrypted form:
Note that the method of password encryption used with the service password-encryption command is not considered to be especially secure, since it can be easily cracked. You should use the service-password encryption command with additional security measures.
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