[Freeipa-users] web admin tool will not login with kerberos ticket

[Rob Crittenden]

Brian Vetter wrote:
> I had a happy, working 2.2 FreeIPA installation humming along last
> week. I had to do some maintenance so I shut everything down. When I
> brought everything up, I can no longer log into the web admin tool. I
> get a "Kerberos ticket is no longer valid" error.
>
> Using the troubleshooting pages on the wiki as a guide, I can kinit
> successfully and see the tickets using klist. I can use the ldapsearch
> tool using GSSAPI to authenticate as well and can return results from
> the ldap server. 'ldapsearch -Y GSSAPI -b "dc=dcc,dc=mobi" uid=admin'
> returns a valid ldap recors for my admin user. I ran this command kinit
> from multiple kerberos principals/users and each worked.
>
> I verified my config settings again with firefox and they are still set
> correctly (auth.delegation-uris, auth.trusted-users both set to my
> domain .dcc.mobi). The cert was accepted (no warnings about the cert not
> being trusted because I had already set it to trusted). I turned on the
> NSPR logging as described in the documents, and didn't see an error,
> although I can't tell if this is correct:
>
>     492291904[7f4d1d31f6a0]:   using REQ_DELEGATE
>     492291904[7f4d1d31f6a0]:   service = geonosis.dcc.mobi
>     492291904[7f4d1d31f6a0]:   using negotiate-gss
>     492291904[7f4d1d31f6a0]: entering nsAuthGSSAPI::nsAuthGSSAPI()
>     492291904[7f4d1d31f6a0]: Attempting to load gss functions
>     492291904[7f4d1d31f6a0]: entering nsAuthGSSAPI::Init()
>     492291904[7f4d1d31f6a0]: nsHttpNegotiateAuth::GenerateCredentials()
>     [challenge=Negotiate]
>     492291904[7f4d1d31f6a0]: entering nsAuthGSSAPI::GetNextToken()
>     492291904[7f4d1d31f6a0]:   leaving nsAuthGSSAPI::GetNextToken [rv=0]
>     492291904[7f4d1d31f6a0]:   Sending a token of length 1394
>
>
> There is nothing in /var/log/httpd/error_log. /var/log/httpd/access_log
> does have a few entries:
>
>     10.1.1.10 - - [16/Oct/2012:18:05:26 -0500] "POST /ca/ocsp HTTP/1.1"
>     200 2298 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:16.0)
>     Gecko/20100101 Firefox/16.0"
>     10.1.1.10 - - [16/Oct/2012:18:05:26 -0500] "POST /ipa/session/json
>     HTTP/1.1" 401 -
>     10.1.1.10 - - [16/Oct/2012:18:05:26 -0500] "GET
>     /ipa/session/login_kerberos HTTP/1.1" 401 1861
>     10.1.1.10 - admin at DCC.MOBI <mailto:admin at DCC.MOBI>
>     [16/Oct/2012:18:05:26 -0500] "GET /ipa/session/login_kerberos
>     HTTP/1.1" 200 -
>     10.1.1.10 - - [16/Oct/2012:18:05:26 -0500] "POST /ipa/session/json
>     HTTP/1.1" 401 -
>
>
> The 401's aren't surprising here since somehow, something is not
> properly authenticating.
>
> I also looked in /var/log/krb5kdc.log and see the following line when
> authenticating:
>
>     Oct 16 18:12:17 geonosis.dcc.mobi krb5kdc[1193](info): TGS_REQ (1
>     etypes {18}) 10.1.1.10: ISSUE: authtime 1350424404, etypes {rep=18
>     tkt=18 ses=18}, admin at DCC.MOBI <mailto:admin at DCC.MOBI> for
>     krbtgt/DCC.MOBI at DCC.MOBI <mailto:krbtgt/DCC.MOBI at DCC.MOBI>
>
>
> I don't believe this describes an error, but I'm not an expert reading
> that log type.
>
>  From what I can tell, the problems seem to be between the apache server
> and the browser. Both worked fine together last week. Is there something
> I can turn on in Apache (perhaps in the ipa.conf or auth_kerb.conf
> files) that can help debug this? Or better yet, anyone else seen this
> and have an answer? Is there some key/ticket/etc associated with the
> http server that might be "wrong" now (somehow whacked during the reboot)?

If you set LogLevel debug in /etc/httpd/conf.d/nss.conf and restart the 
httpd service you'll get a lot of debugging output from ipa and 
mod_auth_kerb, one of which may provide some pointers.

rob