# <a name="Installing Kerberos AFS"></a> Installing Kerberos & AFS
+<div>
+ <ul>
+ <li><a href="#Installing Kerberos AFS"> Installing Kerberos & AFS</a><ul>
+ <li><a href="#Basics"> Basics</a></li>
+ <li><a href="#OpenAFS"> OpenAFS</a><ul>
+ <li><a href="#Starting the Install"> Starting the Install</a></li>
+ <li><a href="#Create AFS Keys and Administrato"> Create AFS Keys and Administrators</a><ul>
+ <li><a href="#KerberosVMIT"> KerberosVMIT</a></li>
+ <li><a href="#HeimdalKTH"> HeimdalKTH</a></li>
+ <li><a href="#KTH Kerberos4"> KTH Kerberos4</a></li>
+ </ul>
+ </li>
+ <li><a href="#Finishing _OpenAFS installation"> Finishing OpenAFS installation</a></li>
+ </ul>
+ </li>
+ <li><a href="#Setting up Transparent Login"> Setting up Transparent Login</a></li>
+ </ul>
+ </li>
+ </ul>
+</div>
+
AFS includes its own implementation of Kerberos, the KAServer. However, new installs of KAServer are not recommended as it is based on a draft version of the obsolete Kerberos 4 protocol. Even though AFS doesn't support [[KerberosV]] directly, it is highly recommended that you set up a [[KerberosV]] realm for your AFS cell and **not** install the KAServer. See [[KerberosV]] for the many advantages of using the latest Kerberos for your network authentication.
Note that this document is under development. Also, I don't try to explain the [[OpenAFS]] specific parts of the install -- This document describes only the changes that have to be made to create a new [[OpenAFS]] cell with [[KerberosV]] authentication. If you have followed these instructions and are still having problems please email the openafs-info mailing list.
Derrick wrote nice pages at: <http://www.cs.cmu.edu/afs/andrew.cmu.edu/usr/shadow/www/afs/afs-with-kerberos.html> <http://www.contrib.andrew.cmu.edu/~shadow/afs/afs-with-kerberos.html>
+[[DenizKanca]] [posted](https://lists.openafs.org/pipermail/openafs-info/2003-January/007799.html) her notes at [http://www.arayan.com/da/yazi/OpenAFS\_Kerberos\_5.html](http://www.arayan.com/da/yazi/OpenAFS_Kerberos_5.html).
+
+[[JeffreyHutzelman]] posted a good [summary](https://lists.openafs.org/pipermail/openafs-info/2003-July/010159.html) of all these component to [[OpenAFS]]-info on 25-Jul-2003. Be sure to check to follow-ups for some minor clarifications.
+
## <a name="Basics"></a> Basics
To continue, you need a working Kerberos realm. See [[SettingUpAuthentication]] for the implementation options, and refer to the documentation that comes with your particular version of Kerberos to establish your realm. It is easiest if your realm name is the caps version of your cell name, which in turn is the same as your site's domain name. For example if your site's domain is 'greekmythology.com', your Kerberos realm name should be 'GREEKMYTHOLOGY.COM' and your AFS cell name should be 'greekmythology.com'. See [[KerberosTerms]] if you are confused on what a "realm" is.
ksrvutil(1) does similar and doesn't require from you to have kadmind(1) running on your machine. The "get" command does same: downloads or (in our case) creates new afs principal using random password. The next example expects that joe.admin is you and you know the proper password to get full access to you kerberos database:
- mv /etc/srvtab /etc/srvtab.orig
- /usr/athena/sbin/ksrvutil -p joe.admin get
- Name [rcmd]: afs
- Instance [hostname]: greekmythology.com
- Realm [GREEKMYTHOLOGY.COM]: GREEKMYTHOLOGY.COM
- Is this correct? (y,n) [y]
- Add more keys? (y,n) [n]
- Password for joe.admin@GREEKMYTHOLOGY.COM
- # list keys in /etc/srvtab, look for the AFS key and it's kvno
- ksrvutil list
- mv /etc/srvtab /etc/srvtab.afskey
- mv /etc/srvtab.orig /etc/srvtab
+ mv /etc/srvtab /etc/srvtab.orig
+ /usr/athena/sbin/ksrvutil -p joe.admin get
+ Name [rcmd]: afs
+ Instance [hostname]: greekmythology.com
+ Realm [GREEKMYTHOLOGY.COM]: GREEKMYTHOLOGY.COM
+ Is this correct? (y,n) [y]
+ Add more keys? (y,n) [n]
+ Password for joe.admin@GREEKMYTHOLOGY.COM
+ # list keys in /etc/srvtab, look for the AFS key and it's kvno
+ ksrvutil list
+ mv /etc/srvtab /etc/srvtab.afskey
+ mv /etc/srvtab.orig /etc/srvtab
If you want to make the above more complicated, you will need <code>**/usr/athena/sbin/ext\_srvtab**</code> utility to extract already existing key from Kerberos KDC and save it into /etc/srvtab. It will ask you for your master kerberos password (but if you installed kerberos in the "proper" way, you've used random password which you don't know at all), so better use <code>**ksrvutil**</code> as described above and forget <code>**ext\_srvtab**</code>.
You can test if you have same keys in kerberos and AFS like this:
- kauth username
- tokens
+ kauth username
+ tokens
If you have some tokens now, then it works and you can now shutdown kaserver. Users, which you have created under kaserver are stored in /usr/afs/db/kaserver.\*, but you can just forget them. Create these users again in Kerberos. With [[KerberosIV]] from KTH they get stored under /var/kerberos, when using Heimdal under /var/heimdal/.
Now we will use the <code>**pts**</code> command in [[OpenAFS]] to add this joe.admin user to the AFS administrators group named system:administrators. The username could be just "joe" or "admin", but it's a good habit to have .admin appended to it (it is called instance). Please note the notation "joe.admin", not "joe/admin" as would be typical in Kerberos5 style:
- pts createuser -name joe.admin -cell greekmythology.com -noauth
- pts adduser joe.admin system:administrators -cell -noauth
+ pts createuser -name joe.admin -cell greekmythology.com -noauth
+ pts adduser joe.admin system:administrators -cell -noauth
where greekmythology.com is the name of your local cell. After your complete this step, you can continue on to...
Activate the new AFS [[KeyFile]] by executing:
- bos restart <machine name> -all -cell <cell name> -noauth
+ bos restart <machine name> -all -cell <cell name> -noauth
After this restart, try using kinit to get Kerberos tickets for admin then (if necessary) use aklog to get an AFS token or use afslog if afsd client cache is already running. Basically ensure that the AFS [[KeyFile]] is valid:
- /usr/heimdal/sbin/ktutil copy AFSKEYFILE:/usr/afs/etc/KeyFile FILE:/etc/afskeytabfile.krb5
- /usr/heimdal/bin/kinit -k -t /etc/afskeytabfile.krb5 afs/greekmythology.com
- # you should be able to autenticate against KDC using the /etc/afskeytabfile.krb5
- # where is saved your afs key in keytab form recognizable by Kerberos5
- /usr/heimdal/klist
- # you should see you have afs/greekmythology.com ticket having some expiration time etc.
+ /usr/heimdal/sbin/ktutil copy AFSKEYFILE:/usr/afs/etc/KeyFile FILE:/etc/afskeytabfile.krb5
+ /usr/heimdal/bin/kinit -k -t /etc/afskeytabfile.krb5 afs/greekmythology.com
+ # you should be able to autenticate against KDC using the /etc/afskeytabfile.krb5
+ # where is saved your afs key in keytab form recognizable by Kerberos5
+ /usr/heimdal/klist
+ # you should see you have afs/greekmythology.com ticket having some expiration time etc.
Proceed to the [Starting File Server](http://www.openafs.org/pages/doc/QuickStartUnix/auqbg005.htm#HDRWQ60) section of the [[OpenAFS]] documentation. The rest of the documentation can be completed without any changes. (What about replacing NTP with something recent, though...? See FAQ [[3.22|Main/AdminFAQ#NTP]] and [[[NTP|Main/FurtherReading#NTP]]])
## <a name="Setting up Transparent Login"></a> Setting up Transparent Login
-In its current state, you have to manually log into your AFS cell through kinit and possibly aklog (explain aklog..., debugging using "tokens" etc). There are several methods to enable transparent login to both local resources (the machine itself) and AFS through a single password. See [[KerberosV]] and [[SettingUpAuthentication]] for some information.
+In its current state, you have to manually log into your AFS cell through kinit and possibly aklog (explain aklog..., debugging using "tokens" etc). There are several methods to enable transparent login to both local resources (the machine itself) and AFS through a single password. See [[KerberosV]] and [[SettingUpAuthentication]] for some information. The best option if you are using pam is probably the [pam\_krb5 project on sourceforge](http://sourceforge.net/projects/pam-krb5/).
-- [[JasonGarman]] - 05 Feb 2002 -- [[DerrickBrashear]] - 26 Nov 2002
git://git.openafs.org / openafs-wiki.git / blobdiff