[OpenAFS] OpenAFS and Krb4 + Krb5

[Jeffrey Altman]

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Daniel Henninger wrote:
> Hi Folk,
> 
> I apologize if this is already answered some where but my own search
> methods are failing me.  We need to migrate from krb4 to krb5 for a
> number of services ASAP.  AFS, of course, is one of these.  Is it
> possible to have OpenAFS capable of handling both krb4 and krb5 at the
> same time?  If not, I'm not coming up with any other ways to migrate
> than to take down all three cells entirely and migrate in one big ugly
> outage.  So...
> 
> Is it possible to have AFS capable of both so we can migrate cleanly?
> 
> I'm not well-versed on the inner workings of AFS, so I'm really just
> looking for a yes/no and maybe a link to some information about setting
> up both.
> 
> Also note that we migrated to Kerberos V5 for authentication long ago
> but have Kerberos V4 support enabled for 'legacy services' (zephyrs,
> kpop, afs's previous life, etc).
> 
> Thanks!
> 
> Daniel

As long as your AFS servers are running versions of OpenAFS capable
of supporting Kerberos 5, the servers are capable of supporting both.
The current restriction is that the key used with Kerberos 5 must
continue to be single DES.

You should read the docs from the AFS-Krb5 migration kit:

   ftp://ftp.cmf.nrl.navy.mil/pub/kerberos5/

You do not require the entire kit.   Depending on the version of OpenAFS
you are using, you will need both aklog and asetkey.

A more complete Kerberos 5 non-DES solution will be available in the
future.

Jeffrey Altman

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