Cisco Router 1841 - How to Change Default Username & Password

[prm_sundar]

Hi All,

I would like to change the default username & password of Cisco router.

Any help would be apreciated.

Thanks

Sundar

[Daniele Giordano]

From console:

router# conf t

router(conf)# username YOUR_NEW_USER password YOUR_NEW_PASSWORD

router(conf)# enable secret YOUR_NEW_SERET_PASSWORD

router(conf)# no username OLD_USER

Regards.

[prm_sundar]

Hi Daniele,

Thanks for your reply.

I tried the above mentioned option.

I could able to implement the "enable secret YOUR_NEW_SERET_PASSWORD" command successfully. Meaning, the password was changed.

But when we launch the putty, the router ask for the password and if i provide the old password (i.e. cisco) then it goes through and display the "Router>" prompt.

Also the default username "cisco" gets as a default username.

My queries are

1. How should we block the default username and password (i.e. cisco & cisco)?

2. Can we create more username and password combination for different usages. For e.g. one for the internal usage and another one for support purpose and we should be in a position to disable and enable support username at any time?

thanks

Sundar

[Daniele Giordano]

Hi.

1. How should we block the default username and password (i.e. cisco & cisco)?

To diasable default username use this command: router(conf)# no username cisco

To enable a new user you must use this other: router(conf)# username DANIELE password 123

2. Can we create more username and password combination for different  usages. For e.g. one for the internal usage and another one for support  purpose and we should be in a position to disable and enable support  username at any time?

Yes, but It's not so easy. External agents are required (e.g. RADIUS or TACACS)

Regards.