Re: [HTCondor-users] authentication error(s)

[Jaime Frey <jfrey@xxxxxxxxxxx>]

HTCondor will attempt KERBEROS authentication if the more typical authentication methods (FS, IDTOKENS) fail.

It looks like you havenât set up strong authentication between your HTCondor machines. I recommend using IDTOKENS.

Before you set that up, Iâd like to know how your configuration ended up with an IP address for TRUST_DOMAIN. Normally, itâs a hostname by default. Can you run the following command and post the output?

condor_config_val -v FULL_HOSTNAME UID_DOMAIN TRUST_DOMAIN

 - Jaime

On Sep 15, 2025, at 11:54âAM, Justin Killebrew via HTCondor-users <htcondor-users@xxxxxxxxxxx> wrote:

I did not enable KERBEROS.  Is it enabled by default?  How do I know if itâs active?  I only use the /etc/hosts file for name resolution for the condor machines.  

Thanks,

JK

On Sep 12, 2025, at 12:55âPM, Steven Timm <timm@xxxxxxxx> wrote:

      External Email - Use Caution      

It would only be trying to resolve the KDC address if you have KERBEROS authentication enabled.  Do you?

I believe Kerberos requires DNS to work and it appears that the way you are configured it isn't.

(presuming that 192.168.1.197 is the only network that's available on the CM)

Steve

---

From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of Justin Killebrew via HTCondor-users <htcondor-users@xxxxxxxxxxx>
Sent: Friday, September 12, 2025 11:40 AM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Cc: Justin Killebrew <jk@xxxxxxx>
Subject: [HTCondor-users] authentication error(s)

 

[EXTERNAL] â This message is from an external sender

This is a fresh Ubuntu 24.04 install. 1 central manager (CM), 1 execute point (EP).  The CM is bench9.timehole.org, 192.168.1.197.

EP MasterLog errors:

    AUTH_ERROR: Cannot resolve network address for KDC in requested realm

    SECMAN: required authentication with collector bench9.timehole.org failed ...

    ERROR: AUTHENTICATE:1003:Failed to authenticate with any method ...

Another symptom/problem:

on the EP: 

    $ condor_config_val trust_domain

    bench9.timehole.org

but on the CM:

    $ condor_config_val trust_domain

    192.168.1.197

I have added this to the EP /etc/condor/condor_config

    ALLOW_WRITE = *.timehole.org

    TRUST_DOMAIN = 192.168.1.197

    STARTD_DEBUG = D_SECURITY

    

But that does not change the condor_config_val trust_domain.  Is there another way to set the trust_domain to the IP address?  Would that fix the AUTH_ERROR: Cannot resolve network address problem?

Thanks for the help.

JK

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