Bug#702116: exim4-daemon-heavy: LDAP for SMTP auth not working

[Paul Muster]

On 07.03.2013 20:39, Paul Muster wrote:
> On 07.03.2013 20:06, Andreas Metzler wrote:
> 
>> Just for debugging, does it work if you specify the IP address of the
>> ldap server instead of its name?
> 
> That works!!11 Great, after weeks of research - it works!
> 
> But why? DNS is ok:
> 
> # su Debian-exim
> \h:\w$ nslookup ldap
> Server:         192.168.1.1
> Address:        192.168.1.1#53
> 
> Name:   ldap.domain.tld
> Address: 192.168.1.8
> 
> \h:\w$ host ldap
> ldap.domain.tld has address 192.168.1.8
> \h:\w$

nslookup and host are successful while dig fails:

# su Debian-exim
\h:\w$ dig ldap

; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> ldap
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 51789
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;ldap.                          IN      A

;; AUTHORITY SECTION:
.                       4051    IN      SOA     a.root-servers.net.
nstld.verisign-grs.com. 2013030701 1800 900 604800 86400

;; Query time: 0 msec
;; SERVER: 192.168.1.254#53(192.168.1.254)
;; WHEN: Thu Mar  7 21:01:44 2013
;; MSG SIZE  rcvd: 97

\h:\w$

Accordingly ist also works when putting LDAP server's FQDN in Exim
authenticator. But why?

# cat /etc/resolv.conf
domain domain.tld
search domain.tld
nameserver 192.168.1.1


Thanks & greetings,

Paul

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