FreeIPA: centralized identity management for Linux
Posted Dec 14, 2012 11:49 UTC (Fri) by ab (subscriber, #788)
Yes, it is mostly Kerberos trust once it is established, except for a lot of small details on verifying ticket extensions in MS-PAC structure (documented in MS-KILE spec) which change over time, and resolution of SIDs (MS-PAC records SIDs, not group or user names so one has to resolve them first to use) which is a complicated matter in complex topologies.
However, in order to establish AD trust one need to use SMB protocol and MS-RPC services. You may want to look at http://freeipa.org/page/IPAv3_Architecture to get some high level overview on what's happenning. The page has some outdated material though, I'm working on updating it as we speek.
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