On Mon, Jun 04, 2018 at 05:33:28AM +0000, Craig H Silva (Cenitex) via 
FreeIPA-users wrote:
> Background - stupidly large AD domain with 30,000 plus groups. It is a forest 
> with a number of legacy domains that are not relevant to our authentication 
> on Linux but the AD admins don't want to allow us to mess with their schema 
> so we still use group membership to manage sudo.
> 
> We're also attempting to align with Windows through use of nested groups to 
> fit in with enterprise preference for RBAC.
> 
> It's complicated and there's no resourcing to put in place an IPA service 
> which would help.
> 
> Anyway these are the relevant config elements:
> 
> id_provider = ad
> auth_provider = ad
> access_provider = ad
> subdomains_provider = none
> enumerate = true
> ignore_group_members = true
> cache_credentials = true
> ldap_id_mapping = true
> ldap_schema = ad
> 
> ( I can provide full config if requested). We had gone to full enumeration 
> and ignore_group_members to ensure that the groups that provide sudo access 
> are available without ridiculous cpu utilisation and it was working but hit 
> this apparent issue:
> 
> [sssd[be[ourdomain.xxx.xxx]]] [ad_enum_cross_dom_members] (0x0080): Failed to 
> add [CN=RG-Ourcompany-Ops-3rd Party-Data\#3-G,OU=CenITex,OU=Operations 
> Roles,OU=Delegated Groups,OU=
> Infrastructure Security,DC=ourcompany,DC=xxx,DC=xxx,,DC=xx]: Input/output 
> error

I guess this issue might be caused by the '\#3' part of the DN which is
not properly sanitized for a search.

Is the literal group name 'RG-Ourcompany-Ops-3rd Party-Data\#3-G'? I'm
asking to see if the '\' was already added to sanitize the original
name.

Do you have other groups with similar name which do not trigger this
error message?

bye,
Sumit

> 
> Can raise a bug report if it's clear that this is the issue.
> 
> Symptom is that group enumeration that was comprehensive, now seems to stop 
> abruptly.
> 
> Cheers
> 
> Craig Silva
> _________
> Craig Silva | Specialist Engineer - Unix Services - Servers, Storage and IDAM
> Cenitex | Level 15, 80 Collins Street, Melbourne 3000
> ph: 03-8688-1297 mob: 0429 365 609 | 
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