krb.realms man page on OSF1

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krb.realms(4)							 krb.realms(4)

NAME
       krb.realms  -  Contains	configuration information that associates host
       names with realm names

SYNOPSIS
       /krb5/krb.realms

DESCRIPTION
       The /krb5/krb.realms file is a text file	 that  associates  host	 names
       with their realm names. Secured applications use the krb.realms file to
       determine the realm from which to request a ticket to gain access to  a
       service.

NOTES
       By  default,  the  Tru64	 UNIX	operating system assumes the uppercase
       equivalent of the host's domain is its realm name. Thus, if your	 realm
       names  are  the	uppercase equivalents of your domain names, you do not
       need to configure and maintain a krb.realms file.

       Wildcards are special characters in the krb.realms file	that  use  one
       entry  to  map  multiple hosts to a single realm. When secured applica‐
       tions search the krb.realms file, they check for a matching host	 name,
       then  a	matching  domain name. If they do not find a match, they check
       for a wildcard match.

       There are two permitted wildcard characters: Use an asterisk (*) with a
       domain  name  to specify all hosts that have that domain root name. For
       example, *.biz.com  specifies  all  hosts  in  all  domains  ending  in
       biz.com, such as footwear.exec.biz.com.	Use a question mark (?) in the
       first field with a host or domain name to specify any letter. For exam‐
       ple, ???footwear.biz.com identifies any host in the biz.com domain that
       has a name with any three letters  preceding  footwear,	such  as  big‐
       footwear.biz.com.

       If  no  associated entry applies or the file does not exist, the host's
       realm name is considered to be the host's domain name converted to  the
       uppercase letter equivalent.

       Multiple	 entries  can be added to the file to identify various conver‐
       sions from host names to realm names. The order of the entries  is  not
       important.

       To  create  comments,  use  the number sign (#). Any characters after a
       number sign are ignored to the end of the line.	Blank  lines  and  any
       leading or trailing white space on a line are also ignored.

       Each  entry  in	the  krb.realms	 file  must  be on a separate line and
       requires the following two fields, separated by a space or a  tab:  The
       first  field  is	 the host name. You can use a domain name to associate
       each host in a domain with the same realm  name.	 When  you  specify  a
       domain  name,  precede the name with a period.  The second field is the
       associated realm name. By convention, realm names are in uppercase let‐
       ters  to	 distinguish  them visually from domain names. Realm names are
       case sensitive; you must type the correct case for the  realm  name  if
       your site does not follow the uppercase convention.

EXAMPLES
       The following is an example of a krb.realms file:

       footwear.biz.com	 SERIOUS.BIZ.COM  #map	host  directly	.admin.biz.com
       ADMIN.BIZ.COM #all hosts in domain *.biz.com BIZ.COM #all other hosts

       The entries in this krb.realms file achieve the following: Line one as‐
       sociates	 the  host  footwear.biz.com  with  the SERIOUS.BIZ.COM realm.
       Line two associates all hosts in	 the  admin.biz.com  domain  with  the
       ADMIN.BIZ.COM realm. The preceding period identifies the first field as
       a domain name rather than a host name.  Typically,  this	 line  is  not
       required	 because  the realm name is the uppercase letter equivalent of
       the domain name.	 However, in this example, it is required  to  prevent
       the  third  line from associating the hosts in the admin.biz.com domain
       to the BIZ.COM realm.  Line three associates all other hosts  in	 other
       domains	with  the root name biz.com to the BIZ.COM realm. For example,
       hosts in sales.biz.com and support.teams.biz.com domains are mapped  to
       the realm BIZ.COM.

SEE ALSO
       Files: krb.conf(4)

								 krb.realms(4)
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