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Annotation of wikisrc/kerberos/system.mdwn, revision 1.9

1.1       schmonz     1: [[!tag kerberos howto]]
                      2: 
1.8       wiki        3: ## Why enable Kerberos on your system?
1.1       schmonz     4: 
1.2       schmonz     5: Convenience and security. With
                      6: [Kerberos](http://web.mit.edu/Kerberos/dialogue.html), a single
1.3       wiki        7: login grants access to all NetBSD web services. Configuration is easy
                      8: and you only have to do it once (sometimes less).
1.1       schmonz     9: 
1.5       schmonz    10: 
1.8       wiki       11: ## NetBSD
1.1       schmonz    12: 
1.2       schmonz    13: NetBSD needs to be configured to prevent Kerberos from being used
                     14: to log into _your_ system, and then to enable Kerberos.
1.1       schmonz    15: 
1.2       schmonz    16: 7. Either disable Kerberos auth for `sshd`, `login`, etc. in
1.4       wiki       17: `/etc/pam.d`, or tell your relevant services not to use PAM.
                     18: 
                     19:    /!\ Disabling KerberosAuthentication in `/etc/ssh/sshd_config` does **NOT** prevent `sshd` from invoking `pam_krb5.so` and prompting for a Kerberos password -- oops. Since you probably do not have a host key in the realm NETBSD.ORG you have little to fear from ssh's KerberosAuthentication method -- nothing can get tickets to use your machine, because there is no host instance for your machine shared between the NetBSD kerberos server and your local keytab. So, the bottom line: turn off UsePAM for `sshd` or adjust your PAM configuration; don't worry about KerberosAuthentication or GSSAPIAuthentication in `sshd` itself.
                     20: 
1.1       schmonz    21: 7. Create `/etc/krb5.conf` containing only the line `[libdefaults]`.
                     22: 
1.2       schmonz    23: NetBSD will now autodiscover and uses the NETBSD.ORG KDC as defined
                     24: in DNS. To use Kerberized TNF services, log in with your Kerberos
                     25: [[password]]:
1.1       schmonz    26: 
1.9     ! schmonz    27:     $ kinit <username>@NETBSD.ORG
1.1       schmonz    28: 
                     29: The right-hand side is a Kerberos realm, not a DNS domain. Case is significant!
1.3       wiki       30: 
1.8       wiki       31: 
1.9     ! schmonz    32: ## Mac OS X
1.8       wiki       33: 
                     34: OS X autodiscovers and uses the NETBSD.ORG KDC as defined in DNS.
                     35: To use Kerberized TNF services, log in with your Kerberos [[password]]:
                     36: 
1.9     ! schmonz    37:     $ kinit <username>@NETBSD.ORG
1.8       wiki       38: 
                     39: The right-hand side is a Kerberos realm, not a DNS domain. Case is significant!
                     40: 
                     41: ### A Keychain.app trick
                     42: 
                     43: To pop up a GUI password dialog:
                     44: 
1.9     ! schmonz    45:     $ kinit <username>@NETBSD.ORG </dev/null
1.8       wiki       46: 
                     47: Check "Remember this password in my keychain" to make future Kerberos
                     48: logins (sans input redirection) prompt-free.
                     49: 
                     50: 
                     51: ## Windows XP
1.3       wiki       52: 
1.9     ! schmonz    53: Windows does not provide an easy way to configure and use KDCs
        !            54: different from the one embedded into an Active Directory.
1.4       wiki       55: 
1.9     ! schmonz    56: Therefore, to use [[Kerberos]], you should follow the following
        !            57: steps:
1.4       wiki       58: 
1.9     ! schmonz    59: 7. Download the
        !            60:    [MIT Kerberos for Windows](http://web.mit.edu/Kerberos/dist/#kfw-3.2)
        !            61:    installer. It is composed of different tools traditionally found
        !            62:    with Kerberos distributions, like
        !            63:    [[!template id=man name=kinit section=1]] or
        !            64:    [[!template id=man name=klist section=1]], and a Network Identity
        !            65:    Manager, an application used to manage credential caching of
        !            66:    Kerberos tickets.
        !            67: 
        !            68: 7. Install the package. Use the default provided options, then
        !            69:    restart the computer.
        !            70: 
        !            71: 7. The Network Identity Manager
        !            72:    [(PDF)](http://web.mit.edu/kerberos/kfw-3.2/kfw-3.2.2/netidmgr_userdoc.pdf)
        !            73:    should automatically start when you login. As there is no principal
        !            74:    currently configured, it should open a dialog box to obtain the
        !            75:    new credentials.
1.4       wiki       76: 
                     77: 7. Enter your principal:
                     78: 
1.9     ! schmonz    79:     Username: <username>
        !            80:     Realm: NETBSD.ORG
1.3       wiki       81: 
1.9     ! schmonz    82: 7. Click `Ok`. After a few seconds, it should obtain the TGT for
        !            83:    you from the NETBSD.ORG KDC.