gss-server error

[lizhong]

Now I have found the reason.
The /etc/hosts file somehow messed up gssapi.
The DNS name of the machine which gss-server is running on is "gcnode029.ca", and the same time, this machine is also called "gcnode029" in the /etc/hosts file.
So when I tried to create a client in kdc called test/gcnode029.ca at test.com, surely I should run the gss-server using cmd:
[root at gcnode029 gss-sample]# ./gss-server -port 8888 test/gcnode029.ca
But the host name gcnode029.ca somehow caused a error:
GSS-API error acquiring credentials: Unspecified GSS failure.  Minor code may provide more information
GSS-API error acquiring credentials: No principal in keytab matches desired name

But if I create a test/gcnode029 at test.com, and run gss-server using cmd:
[root at gcnode029 gss-sample]# ./gss-server -port 8888 test/gcnode029
Now everything runs perfectly.
I don't know the exactly reason for those above. Maybe the name defined in /etc/host and the DNS name are mixed together somehow.
I searched a lot using google, and found that many people met the same problem as mine. Hope the method above would help.


----- Original Message ----- 
From: "lizhong" <lizhong at ncic.ac.cn>
To: "Michael B Allen" <mba2000 at ioplex.com>
Cc: <kerberos at mit.edu>
Sent: Tuesday, August 22, 2006 10:27 AM
Subject: Re: gss-server error


> In the manual by Jim Rome, "How to Kerberize your site "(http://www.ornl.gov/~jar/HowToKerb.html#Configure), all examples are in lowercare.
> So I think there might be a DNS issue, or I used the parameters of the gss-server improperly.
> 
> The server's command line usage is
>  
> gss-server [-port port] [-verbose] [-once] [-inetd] [-export]
>  [-logfile file] service_name
>  
> where service_name is a GSS-API service name of the form"service at host" (or just "service", in which case the local host name is used). 
> 
> Now I have 2 machines, the KDC server is called A, and the application server is called B. The gss-server in on the machine B.The keytab file has been generated on the machine B:
> [root at gcnode029 gss-sample]# klist -k
> Keytab name: FILE:/etc/krb5.keytab
> KVNO Principal
> ---- --------------------------------------------------------------------------
>   6 test/admin at test.com
> 
> When I try to run gss-server using the command:"./gss-server -port 8888 -once test/admin at test.com", output:
> [root at gcnode029 gss-sample]# ./gss-server -port 8888 -once test/admin at test.com
> GSS-API error acquiring credentials: An invalid name was supplied
> GSS-API error acquiring credentials: Hostname cannot be canonicalized
> 
> When I try to run gss-server using the command:"./gss-server -port 8888 -once test/admin", output:
> [root at gcnode029 gss-sample]# ./gss-server -port 8888 -once test/admin
> GSS-API error acquiring credentials: Unspecified GSS failure.  Minor code may provide more information
> GSS-API error acquiring credentials: No principal in keytab matches desired name
> 
> When I try to run gss-server using the command:"./gss-server -port 8888 -once test", output:
> [root at gcnode029 gss-sample]# ./gss-server -port 8888 -once test
> GSS-API error acquiring credentials: Unspecified GSS failure.  Minor code may provide more information
> GSS-API error acquiring credentials: No principal in keytab matches desired name
> 
> In fact I don't know exactly what the service-name should be like. Is the errors above coursed by DNS problem?or by keytab file?
> 
> 
> ----- Original Message ----- 
> From: "Michael B Allen" <mba2000 at ioplex.com>
> To: "lizhong" <lizhong at ncic.ac.cn>
> Cc: <kerberos at mit.edu>
> Sent: Monday, August 21, 2006 10:29 PM
> Subject: Re: gss-server error
> 
> 
>>A Kerberos realm is always in uppercase [1]. If you did *everything*
>> with a lowercase realm name I suspect things might work but perhaps not.
>> 
>> Or, based on the second error, perhaps there is a DNS issue?
>> 
>> Mike
>> 
>> [1] The realm is effectively the DNS domain in uppercase and therefore
>> it is not uncommon to see lowercase names (e.g. DNS oriented software).
>> 
>> On Mon, 21 Aug 2006 17:00:03 +0800
>> "lizhong" <lizhong at ncic.ac.cn> wrote:
>> 
>>> I'm trying to test with gss-client and gss-server but am unsuccessful in 
>>> getting it to work.
>>> 
>>> I have setup a MIT Realm called test.com and added a client named test/admin at test.com.
>>> I am able to kinit and get a ticket from the KDC. 
>>> 
>>> [root at gcnode029 gss-sample]# kinit
>>> Password for test/admin at test.com: 
>>> kinit(v5): Password incorrect while getting initial credentials
>>> [root at gcnode029 gss-sample]# klist
>>> Ticket cache: FILE:/tmp/krb5cc_0
>>> Default principal: test/admin at test.com
>>> 
>>> Valid starting     Expires            Service principal
>>> 08/21/06 15:45:15  08/22/06 15:45:15  krbtgt/test.com at test.com
>>> 
>>> 
>>> Kerberos 4 ticket cache: /tmp/tkt0
>>> klist: You have no tickets cached
>>> [root at gcnode029 gss-sample]# 
>>> 
>>> But if I run "gss-server -port 8888 -verbose -once test/admin at test.com", I met the following error:
>>> 
>>> [root at gcnode029 gss-sample]# ./gss-server -port 8888 -verbose -once test/admin at test.com
>>> GSS-API error acquiring credentials: An invalid name was supplied
>>> GSS-API error acquiring credentials: Hostname cannot be canonicalized
>>> 
>>> I guess I used the service name in an improper way. So what service name should I use? Thank you for any help!
>>> 
>>> 
>>> 
>> 
>> 
>> -- 
>> Michael B Allen
>> PHP Active Directory SSO
>> http://www.ioplex.com/
>> 
>>
> 
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