On 03/13/2012 11:27 AM, Eivind Olsen wrote:
I'm currently looking at implementing IPA in a mixed environment,
consisting of RHEL6, RHEL5 and Solaris 10 systems. The IPA server(s) is
the most recent one bundled with RHEL 6.2.
I have some general rules I'll need to follow as best as I can, but I'm
not really sure how to do this in IPA without it seeming like a huge
work-around. This seems easy enough had it been for a pure RHEL6
environment, but with Solaris there's no SSSD, I apparantly might need to
downgrade the encryption types for "older" Solaris 10, etc. All of this is
making my head dizzy, and I'd appreciate any help and pointers to clear my
Examples of the basic rules are (there's more of them, it's not only for
the DNS servers for example, but the other cases can be solved in the same
- all sysadmins should be allowed to log into every system in the realm
- all sysadmins should be allowed to run certain commands (or to make it
easy, any command) through the use of "sudo", on all systems
- some users will be part of certain groups, giving them permission to log
into certain servers and run a set of commands through "sudo", for
example: members of the dns-managers group should be allowed to ssh into
the DNS servers (which consist of both RHEL6 and Solaris 10), and run
certain commands through "sudo"
- certain other users will be allowed to log into some systems, but
without any additional access through "sudo" (the fact that they're
allowed to log into system X doesn't mean they should be allowed to become
I've read a suggestion about making a host group for the Red Hat systems,
a netgroup for the Solaris systems, and creating a user group which is
added as a member of both the host group and netgroup. But, will I still
need to worry about the old issue of Solaris apparantly not coping well
with users that have>16 additional groups to their name?
I have also read about having to add / change compatibility plugins,
having to downgrade the algorithm for the Solaris 10 encryption type for
older Solaris 10 releases, etc. And there's probably a few more things I
need to watch out for and that aren't directly mentioned in the IPA
Oh, in case it matters - there's no common NFS home directories, so I'll
also need to automatically create the home directories (I've got this bit
sorted on RHEL6 with help from oddjob-mkhomedir). For Solaris, I've read
suggestions about using executable autofs maps to create home directories
in /export/home and have tham loopback-mounted to /home so they match the
I have implemented Solaris 10 with IPA with success. AES256 did not come
to Solaris 10 until around update 7 or 8. There is still a bug where the
required crypto provider is not enabled.
# cryptoadm list
You should have "pkcs11_softtoken_extra.so" listed for aes256 support.
If not, use the cryptoadm command to install and enable the provider. We
have deployed the kerberos keytabs retreived with ipa-getkeytab without
any limitations on encryption types for all Solaris 10 clients as soon
as this provider was enabled.
For access restrictions on Solaris 10, adding a user group to
AllowGroups in /etc/ssh/sshd_config is probably your best bet for
locking down Solaris machines. We've used the netgroup way of
controlling access to services with NIS, but I could not get the same
working properly for LDAP.
There is also a nscd bug we recently discovered which keeps nscd
stalling at random intervals, preventing user logins. Search at
support.oracle.com, I don't have the patch number available just now.
More than 16 groups: NFS and AUTH_SYS with the Solaris NFS server still
have an issue with more than 16 groups, as per the IETF standard.
Solaris can still see all the groups with "# groups username". Using
NFS4+Krb5 solves that issue. I have not met the 16 group issue anywhere
If you want to lock down your Directory Server to not serve anonymous
users, you need a fairly recent patched Solaris ldapclient that supports
"-D bindDN" and "-w bindPassword" options. "-a proxyDN" and "-a
proxyPassword" is not enough as the Solaris ldapclient expects nisDomain
in the directory root to be available anonymously.
I opened request https://bugzilla.redhat.com/show_bug.cgi?id=815515 for
an updated DUAConfigProfile supporting more nss databases.
I also opened https://bugzilla.redhat.com/show_bug.cgi?id=815533 for
updating the Solaris 10 IPA Client documentation.
Hope this helps.
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