1: [[!tag kerberos howto]]
3: ## Why enable Kerberos on your system?
5: Convenience and security. With
6: [Kerberos](http://web.mit.edu/Kerberos/dialogue.html), a single
7: login grants access to all NetBSD web services. Configuration is easy
8: and you only have to do it once (sometimes less).
11: ## NetBSD
13: NetBSD needs to be configured to prevent Kerberos from being used
14: to log into _your_ system, and then to enable Kerberos.
16: 7. Either disable Kerberos auth for `sshd`, `login`, etc. in
17: `/etc/pam.d`, or tell your relevant services not to use PAM.
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.
21: 7. Create `/etc/krb5.conf` containing only the line `[libdefaults]`.
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
27: $ kinit <username>@NETBSD.ORG
29: The right-hand side is a Kerberos realm, not a DNS domain. *Case is significant!*
32: ## Mac OS X
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]]:
37: 7. Launch `Ticket Viewer.app` from `/System/Library/CoreServices`
39: 7. Press the "Add Identity" button
41: 7. In the identity field enter your `<username>@NETBSD.ORG`
43: The right-hand side is a Kerberos realm, not a DNS domain. *Case is significant!*
45: 7. Enter the password associated with this identity in the password field
47: By default Ticket Viewer.app will save password details in keychain, un-tick "Remember password in my keychain" if this is not desired behaviour
49: 7. Press continue
51: If successful, you'll be returned to the main window with a new entry below the icons containing `<username>@NETBSD.ORG` and the date and time which the ticket obtained is due to expire.
53: ## Windows XP
55: Windows does not provide an easy way to configure and use KDCs
56: different from the one embedded into an Active Directory.
58: Therefore, to use [[Kerberos]], you should follow the following
61: 7. Download the
62: [MIT Kerberos for Windows](http://web.mit.edu/Kerberos/dist/#kfw-3.2)
63: installer. It is composed of different tools traditionally found
64: with Kerberos distributions, like
65: [[!template id=man name=kinit section=1]] or
66: [[!template id=man name=klist section=1]], and a Network Identity
67: Manager, an application used to manage credential caching of
68: Kerberos tickets.
70: 7. Install the package. Use the default provided options, then
71: restart the computer.
73: 7. The Network Identity Manager
75: should automatically start when you login. As there is no principal
76: currently configured, it should open a dialog box to obtain the
77: new credentials.
79: 7. Enter your principal:
81: Username: <username>
82: Realm: NETBSD.ORG
84: 7. Click `Ok`. After a few seconds, it should obtain the TGT for
85: you from the NETBSD.ORG KDC.
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