Difference between revisions of "PowerDNS LDAP Backend/Troubleshooting"
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== Use of quotation marks ("") == | == Use of quotation marks ("") == | ||
| − | Do never use quotation marks in the PowerDNS | + | Do never use quotation marks in the PowerDNS configuration files! They are not evaluated and remain part of the parameter value. This leads to hard to find errors, e.g. no objects are returned from the LDAP directory. |
== No reverse zone transfer == | == No reverse zone transfer == | ||
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== IPv6 reverse lookup doesn't work in strict mode == | == IPv6 reverse lookup doesn't work in strict mode == | ||
| − | For automatically generated reverse IPv6 records your | + | For automatically generated reverse IPv6 records your aAAARecord entries must follow two restrictions: They have to be fully expanded ("FFFF::1" is not allowed and it must be "FFFF:0:0:0:0:0:0:1" instead) and they must not contain leading zeros, e.g. an entry containing "002A" is incorrect - use "2A" without zeros instead. These restrictions are due to the fact that LDAP DNS AAAA entries are pure text and doesn't allow searching by wild-cards. |
== Bad search filter == | == Bad search filter == | ||
Revision as of 19:09, 6 May 2007
Contents
Use of quotation marks ("")
Do never use quotation marks in the PowerDNS configuration files! They are not evaluated and remain part of the parameter value. This leads to hard to find errors, e.g. no objects are returned from the LDAP directory.
No reverse zone transfer
Your LDAP tree must contain a separate subtree of PTR records (e.g. for 1.1.10.10.in-addr.arpa) and you can't set "ldap-method" to "strict".
IPv6 reverse lookup doesn't work in strict mode
For automatically generated reverse IPv6 records your aAAARecord entries must follow two restrictions: They have to be fully expanded ("FFFF::1" is not allowed and it must be "FFFF:0:0:0:0:0:0:1" instead) and they must not contain leading zeros, e.g. an entry containing "002A" is incorrect - use "2A" without zeros instead. These restrictions are due to the fact that LDAP DNS AAAA entries are pure text and doesn't allow searching by wild-cards.
Bad search filter
The release of PowerDNS 2.9.20 contains a bug in ldap-filter-{axfr,lookup}. A user provided string with ":target:" is replaced with "(associatedDomain=QUERYDATA)" and braces ARE added. So if you create some filter like
ldap-filter-lookup=(&(:target:)(active=yes))
it will result as
ldap-filter-lookup=(&((associatedDomain=QUERYDATA))(active=yes))
which results with bad search filter. To circumvent the bug temporarily you can add instead
ldap-filter-lookup=(&:target:(active=yes))
The bug will be fixed in version 2.9.21 and later versions.
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