On 2017/5/14 04:19, Alexander Bokovoy wrote:
> On su, 14 touko 2017, Patrick Hemmer wrote:
>> I'm working on spinning up a FreeIPA server with an AD trust. I've
>> followed the official guide
>> (https://www.freeipa.org/page/Active_Directory_trust_setup), and
>> everything works up to the point of trying to add external members to
>> the group. Whenever I try I get:
>> # ipa group-add-member ad_admins_external --external 'CHEWY\Domain
>> Admins'
>> [member user]:
>> [member group]:
>>  Group name: ad_admins_external
>>  Description: ad_domain admins external map
>>  Failed members:
>>    member user:
>>    member group: CHEWY\Domain Admins: trusted domain object not found
>> -------------------------
>> Number of members added 0
>> -------------------------
>> I turned up the debugging to 100, re-established the trust, and tried to
>> perform the group-add-member again. Logs have uploaded the logs here:
>> https://s3.amazonaws.com/phemmer-misc/freeipa-logs.tar.gz
>> I'm just testing the procedure on a couple local development VMs, so
>> there's nothing sensitive in there.
>> Confusingly, according to the httpd log the operation was successful:
>> [Sun May 14 01:49:24.171867 2017] [:error] [pid 23688] ipa: INFO:
>> [jsonserver_session] admin@LOCAL:
>> group_add_member/1(u'ad_admins_external',
>> ipaexternalmember=(u'CHEWY\\\\Domain Admins',), version=u'2.213'):
>> I'm not sure where the issue here lies. So any insight would be
>> appreciated.
> The issue is in your choice of IPA domain name: local. This is not going
> to work with AD -- as you can see, there are subtle issues. Even though
> AD DC accepts a trust to LOCAL forest, it cannot really operate it
> internally, thus even looking up forest topology fails at the point when
> IPA framework attempts to authenticate. See [1] for list of limitations
> in pure Active Directory for single-label domains.
> [1]
> https://support.microsoft.com/en-us/help/300684/deployment-and-operation-of-active-directory-domains-that-are-configured-by-using-single-label-dns-names
> We don't recommend using single-label DNS configurations. Even in a lab
> environment they are source of various issues.

Thanks, switching to a second level domain did indeed solve the issue.

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