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Bug #30107 ldap_bind does a dns lookup for "localhost" (mod_php not CLI)
Submitted: 2004-09-16 10:27 UTC Modified: 2004-09-16 10:43 UTC
From: php at gunnarwrobel dot de Assigned:
Status: Not a bug Package: LDAP related
PHP Version: 4.3.8 OS: Gentoo 2004.2
Private report: No CVE-ID: None
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From: php at gunnarwrobel dot de
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 [2004-09-16 10:27 UTC] php at gunnarwrobel dot de 
Description:
------------
After connecting to OpenLDAP on "localhost" subsequent binding fails.
This only happens in mod_php, not with CLI.

Apparently the ldap_bind function of mod_php is unable to resolve "localhost". 

This might be related to bug #29587

Regards

Gunnar

Reproduce code:
---------------
<?
$ds=ldap_connect("localhost", 389);
ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
if(!ldap_bind($ds,"uid=myuid,dc=mydom,dc=de","mypass")) 
{
  print "<br />Error<br />";
  print(ldap_error($ds));
}
?>

Expected result:
----------------
No error.

Actual result:
--------------
Error
Can't contact LDAP server.

TCPdump reports a request to the name server:

10:20:35.050539 IP myserver.mydom.info.41604 > dns2.arcor-ip.de.domain:  60613+ AAAA? localhost. (27)
10:20:35.061182 IP dns2.arcor-ip.de.domain > myserver.mydom.info.41604:  60613 NXDomain 0/1/0 (102)

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 [2004-09-16 10:43 UTC] sniper@php.net 
It's either a bug in openldap (unlikely) or misconfigured system of yours. Check your /etc/hosts and /etc/resolv.conf files. See also:

http://www.netsys.com/openldap-software/2002/08/msg00020.html

This is absolutely not a PHP bug whatsoever..
 
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