IPA implements read/write permissions for DNS record or zones.
Provided set of permissions and privileges can, however, only grant
access to the whole DNS tree, which may not be appropriate.
Administrators may miss more fine-grained permissions allowing
them to delegate access per-zone.
Create a new IPA auxiliary objectclass ipaDNSZone allowing
a managedBy attribute for a DNS zone. This attribute will hold
a group DN (in this case a permission) which allows its members
to read or write in a zone. Member permissions in given zone
will only have 2 limitations:
1) Members cannot delete the zone
2) Members cannot edit managedBy attribute
Current DNS deny ACI used to enforce read access is removed so that
DNS privileges are based on allow ACIs only, which is much more
flexible approach as deny ACIs have always precedence and limit
other extensions. Per-zone access is allowed in 3 generic ACIs
placed in cn=dns,$SUFFIX so that no special ACIs has to be added
to DNS zones itselves.
2 new commands have been added which allows an administrator to
create the system permission allowing the per-zone access and
fill a zone's managedBy attribute:
* dnszone-add-permission: Add per-zone permission
* dnszone-remove-permission: Remove per-zone permission
https://fedorahosted.org/freeipa/ticket/2511
For security reasons, dynamic updates are not enabled for new DNS
zones. In order to enable the dynamic zone securely, user needs to
allow dynamic updates and create a zone update policy.
The policy is not easy to construct for regular users, we should
rather fill it by default and let users just switch the policy
on or off.
https://fedorahosted.org/freeipa/ticket/2441
bind-dyndb-ldap persistent search queries LDAP for all DNS records.
The LDAP connection must have no size or time limits to work
properly.
This patch updates limits both for existing service principal
on updated machine and for new service principals added
as a part of DNS installation.
https://fedorahosted.org/freeipa/ticket/2531
With a publicly accessible DNS tree in LDAP, anyone with an access
to the LDAP server can get all DNS data as with a zone transfer
which is already restricted with ACL. Making DNS tree not readable
to public is a common security practice and should be applied
in FreeIPA as well.
This patch adds a new deny rule to forbid access to DNS tree to
users or hosts without an appropriate permission or users which
are not members of admins group. The new permission/aci is
applied both for new installs and upgraded servers.
bind-dyndb-ldap plugin is allowed to read DNS tree without any
change because its principal is already a member of "DNS
Servers" privilege.
https://fedorahosted.org/freeipa/ticket/2569
New features in bind-dyndb-ldap and IPA DNS plugin pulled new
attributes and objectclasses. ACIs and permissions need to be
updated to allow users with appropriate permissions update
these attributes in LDAP.
This patch updates the ACI for DNS record updates and adds one
new permission to update global DNS configuration.
https://fedorahosted.org/freeipa/ticket/2510
SSH public key support includes a feature to automatically add/update
client SSH fingerprints in SSHFP records. However, the update won't
work for zones created before this support was added as they don't
allow clients to update SSHFP records in their update policies.
This patch lets dns upgrade module extend the original policy
to allow the SSHFP dynamic updates. It updates only original
policy, we don't want it to overwrite custom user policies.
https://fedorahosted.org/freeipa/ticket/2394
Provide a way to specify BIND allow-query and allow-transfer ACLs
for DNS zones.
IMPORTANT: new bind-dyndb-ldap adds a zone transfer ability. To
avoid zone information leaks to unintended places, allow-transfer
ACL for every zone is by default set to none and has to be
explicitly enabled by an Administrator. This is done both for new
DNS zones and old DNS zones during RPM update via new DNS upgrade
plugin.
https://fedorahosted.org/freeipa/ticket/1211
Martin Kosek
Rob Crittenden