Chapter 3 Installing the Cisco 12404 Internet Router
Configuration Changes
3-61
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Host Name
The name you assign the router must follow the rules for ARPANET host names.
It must start with a letter, end with a letter or digit, and have as interior characters
only letters, digits, and hyphens. The name must consist of 63 or fewer characters.
For more information, see Requests For Comments (RFC) 1035, Domain
Names—Implementation and Specifications.
Upper- and lowercase characters look the same to many Internet software
applications for ease of use computer names should appear in all lowercase. For
more information, see RFC 1178, Choosing a Name for Your Computer.
Passwords
The commands available at the user EXEC level are a subset of those available at
the privileged EXEC level. Many privileged EXEC commands are used to set
system parameters, you should password-protect these commands to prevent their
unauthorized use. For information on how to establish password protection or
configure privilege levels, see the “Configuring Passwords and Privileges”
chapter in the
Security Configuration Guide
, which is one of the modular
configuration publications in the Cisco IOS software configuration
documentation set that corresponds to the Cisco IOS software release installed on
your Cisco hardware.
The
enable secret
password functionality is available for Cisco 12000 series
Internet router. You must enter the correct password on the system console, to
gain access to privileged-level commands. When you are running from the ROM
monitor, you can use the
enable
password, depending on your boot ROM level.
For maximum security, the
enable secret
and the
enable
password
should be
different. If you use the same password for both the
enable secret
and
enable
functions during the
setup
process, the system accepts it but issues a warning
indicating that you should enter a different password.
An
enable secret
password can contain from 1 to 25 uppercase and lowercase
alphanumeric characters; an
enable
password can contain any number of
uppercase and lowercase alphanumeric characters.
You cannot use a number as the first character. Spaces, however, are valid
password characters. For example,
two words
is a valid password. Leading spaces
are ignored, but trailing spaces are recognized.
todd.book Page 61 Tuesday, November 27, 2007 6:02 PM
