I followed your suggestions without much luck.

Adding the kerberos keytab didn't change anything, when I try login through
the UI it just redirects me again with the same notice:
Your session has expired. Please re-login.

However if I login with the incorrect details logs will show INFO: 401
Unauthorized: kinit: Client 'a...@domain.com' not found in Kerberos database
while getting initial credentials and the UI will give me an error message.

It seems when it's logged in with the correct credentials it's still
finding itself lost. I have a feeling I'm overlooking something so simple..

Andrew


On Wed, Aug 14, 2013 at 4:23 PM, Alexander Bokovoy <aboko...@redhat.com>wrote:

> On Wed, 14 Aug 2013, Andrew Lau wrote:
>
>> Hi,
>>
>> I've got my FreeIPA setup in an internal infrastructure, but I want to be
>> able to have users access the web UI externally. I tweaked the
>> ipa-rewrite.conf so it won't redirect me to the FQDN and then tried both a
>> nginx reverse proxy and port forwarding, both works if the client manually
>> sets the host name of the IPA server eg. ipa01.internaldomain.local in
>> their /etc/hosts file. However if the client tries to to use eg.
>> ipa.externaldomain.com with the same port forwarding or nginx proxy
>> config,
>> it'll silently error. The docs briefly touches on this - but doesn't
>> really
>> give much to go on.
>>
>> Any suggestions?
>>
> Couple considerations here.
>
> First, you may need to play with debug level to see what principal
> mod_auth_kerb picks up when negotiation happens.
>
> Second, using Kerberos authentication requires both sides to own
> Kerberos principals for authentication process to go. Browsers select
> HTTP/server.fqdn as their target service principal when connection to
> the server.fqdn. Your IPA server only has HTTP/ipa01.internaldomain.**
> local
> in its keytab in /etc/httpd/conf/ipa.keytab, which means it would only
> be able to respond on ipa01.internaldomain.local to Kerberos auth requests.
>
> A way to fix this is by making HTTP/ipa.externaldomain.com service in
> IPA (ipa service-add HTTP/ipa.externaldomain.com) and then use
> 'ipa-getkeytab' to fetch the keytab with the key for the service. Next
> step would be to merge content of this keytab with
> /etc/httpd/conf/ipa.keytab:
>
> (echo rkt /tmp/external.keytab; echo wkt /etc/httpd/conf/ipa.keytab)
> |ktutil
>
> Then restart httpd -- I'm not sure mod_auth_kerb re-reads the keytab on
> its change.
>
> --
> / Alexander Bokovoy
>
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