SEAM Tool Reference
This section provides descriptions of each panel in the SEAM Tool. Also, information
about using limited privileges with SEAM Tool are provided.
SEAM Tool Panel Descriptions
This section provides descriptions for each principal and policy attribute that you can
either specify or view in the SEAM Tool. The attributes are organized by
the panel in which they are displayed.
Table 25-2 Attributes for the Principal Basics Panel of the SEAM Tool
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Principal Name |
The name of the principal
(which is the primary/ instance part of a fully qualified principal name). A principal
is a unique identity to which the KDC can assign tickets. If you
are modifying a principal, you cannot edit its name. |
Password |
The password for the
principal. You can use the Generate Random Password button to create a random
password for the principal. |
Policy |
A menu of available policies for the principal. |
Account Expires |
The
date and time on which the principal's account expires. When the account expires,
the principal can no longer get a ticket-granting ticket (TGT) and might be
unable to log in. |
Last Principal Change |
The date on which information for
the principal was last modified. (Read only) |
Last Changed By |
The name of the principal
that last modified the account for this principal. (Read only) |
Comments |
Comments that are related
to the principal (for example, “Temporary Account”). |
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Table 25-3 Attributes for the Principal Details Panel of the SEAM Tool
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Last Success |
The date and time when the
principal last logged in successfully. (Read only) |
Last Failure |
The date and time when the
last login failure for the principal occurred. (Read only) |
Failure Count |
The number of times
a login failure has occurred for the principal. (Read only) |
Last Password Change |
The date
and time when the principal's password was last changed. (Read only) |
Password Expires |
The date
and time when the principal's current password expires. |
Key Version |
The key version number
for the principal. This attribute is normally changed only when a password has
been compromised. |
Maximum Lifetime (seconds) |
The maximum length of time for which a ticket
can be granted for the principal (without renewal). |
Maximum Renewal (seconds) |
The maximum length of
time for which an existing ticket can be renewed for the principal. |
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Table 25-4 Attributes of the Principal Flags Panel of the SEAM Tool
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Disable Account |
When checked, prevents the principal from logging in. This attribute provides an
easy way to temporarily freeze a principal account. |
Require Password Change |
When checked, expires
the principal's current password, which forces the user to use the kpasswd command
to create a new password. This attribute is useful if a security breach
occurs, and you need to make sure that old passwords are replaced. |
Allow Postdated
Tickets |
When checked, allows the principal to obtain postdated tickets. For example, you
might need to use postdated tickets for cron jobs that must run
after hours, but you cannot obtain tickets in advance because of short ticket
lifetimes. |
Allow Forwardable Tickets |
When checked, allows the principal to obtain forwardable tickets. Forwardable tickets
are tickets that are forwarded to the remote host to provide a single-sign-on
session. For example, if you are using forwardable tickets and you authenticate yourself
through ftp or rsh, then other services, such as NFS services, are available
without your being prompted for another password. |
Allow Renewable Tickets |
When checked, allows the principal
to obtain renewable tickets. A principal can automatically extend the expiration date or time
of a ticket that is renewable (rather than having to get a
new ticket after the first ticket expires). Currently, the NFS service is the ticket
service that can renew tickets. |
Allow Proxiable Tickets |
When checked, allows the principal to
obtain proxiable tickets. A proxiable ticket is a ticket that can be used
by a service on behalf of a client to perform an operation for
the client. With a proxiable ticket, a service can take on the identity
of a client and obtain a ticket for another service. However, the service
cannot obtain a ticket-granting ticket (TGT). |
Allow Service Tickets |
When checked, allows service tickets to
be issued for the principal. You should not allow service tickets to be
issued for the kadmin/hostname and changepw/hostname principals. This practice ensures that only these
principals can update the KDC database. |
Allow TGT-Based Authentication |
When checked, allows the service
principal to provide services to another principal. More specifically, this attribute allows the KDC
to issue a service ticket for the service principal. This attribute is valid
only for service principals. When unchecked, service tickets cannot be issued for the
service principal. |
Allow Duplicate Authentication |
When checked, allows the user principal to obtain service
tickets for other user principals. This attribute is valid only for user principals. When
unchecked, the user principal can still obtain service tickets for service principals, but not
for other user principals. |
Required Preauthentication |
When checked, the KDC will not send a
requested ticket-granting ticket (TGT) to the principal until the KDC can authenticate (through software)
that the principal is really the principal that is requesting the TGT. This
preauthentication is usually done through an extra password, for example, from a DES
card. When unchecked, the KDC does not need to preauthenticate the principal before the
KDC sends a requested TGT to the principal. |
Required Hardware Authentication |
When checked, the
KDC will not send a requested ticket-granting ticket (TGT) to the principal until
the KDC can authenticate (through hardware) that the principal is really the principal
that is requesting the TGT. Hardware preauthentication can occur, for example, on a
Java ring reader. When unchecked, the KDC does not need to preauthenticate the principal before
the KDC sends a requested TGT to the principal. |
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Table 25-5 Attributes for the Policy Basics Pane of the SEAM Tool
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Policy Name |
The name of
the policy. A policy is a set of rules that govern a principal's
password and tickets. If you are modifying a policy, you cannot edit its
name. |
Minimum Password Length |
The minimum length for the principal's password. |
Minimum Password Classes |
The minimum
number of different character types that are required in the principal's password. For example,
a minimum classes value of 2 means that the password must have at
least two different character types, such as letters and numbers (hi2mom). A value
of 3 means that the password must have at least three different character
types, such as letters, numbers, and punctuation (hi2mom!). And so on. A value
of 1 sets no restriction on the number of password character types. |
Saved Password
History |
The number of previous passwords that have been used by the principal, and
a list of the previous passwords that cannot be reused. |
Minimum Password Lifetime
(seconds) |
The minimum length of time that the password must be used before it
can be changed. |
Maximum Password Lifetime (seconds) |
The maximum length of time that the
password can be used before it must be changed. |
Principals Using This Policy |
The number
of principals to which this policy currently applies. (Read only) |
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Using the SEAM Tool With Limited Kerberos Administration Privileges
All features of the SEAM Tool are available if your admin principal has
all the privileges to administer the Kerberos database. However, you might have limited privileges,
such as only being allowed to view the list of principals or to
change a principal's password. With limited Kerberos administration privileges, you can still use
the SEAM Tool. However, various parts of the SEAM Tool change based on
the Kerberos administration privileges that you do not have. Table 25-6 shows how the
SEAM Tool changes based on your Kerberos administration privileges.
The most visual change to the SEAM Tool occurs when you don't have
the list privilege. Without the list privilege, the List panels do not display
the list of principals and polices for you to manipulate. Instead, you must
use the Name field in the List panels to specify a principal or
a policy that you want to manipulate.
If you log in to the SEAM Tool, and you do not
have sufficient privileges to perform tasks with it, the following message displays and you
are sent back to the SEAM Administration Login window:
Insufficient privileges to use gkadmin: ADMCIL. Please try using another principal.
To change the privileges for a principal so that it can administer the
Kerberos database, go to How to Modify the Kerberos Administration Privileges.
Table 25-6 Using the SEAM Tool With Limited Kerberos Administration Privileges
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a (add) |
The Create
New and Duplicate buttons are unavailable in the Principal List and Policy List
panels. Without the add privilege, you cannot create new principals or policies, or
duplicate them. |
d (delete) |
The Delete button is unavailable in the Principal List and
Policy List panels. Without the delete privilege, you cannot delete principals or policies. |
m (modify) |
The
Modify button is unavailable in the Principal List and Policy List panels. Without
the modify privilege, you cannot modify principals or policies. Also, with the Modify
button unavailable, you cannot modify a principal's password, even if you have the
change password privilege. |
c (change password) |
The Password field in the Principal Basics panel
is read only and cannot be changed. Without the change password privilege, you cannot
modify a principal's password. Note that even if you have the change
password privilege, you must also have the modify privilege to change a principal's
password. |
i (inquiry to database) |
The Modify and Duplicate buttons are unavailable in the
Principal List and Policy List panels. Without the inquiry privilege, you cannot modify or
duplicate a principal or a policy. Also, with the Modify button unavailable,
you cannot modify a principal's password, even if you have the change password
privilege. |
l (list) |
The list of principals and policies in the List panels are
unavailable. Without the list privilege, you must use the Name field in the
List panels to specify the principal or the policy that you want to
manipulate. |
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