client dns lookups, can they be disabled?

[Geoff Swan <gswan3@bigpond.net.au>]

Hi,

I have a system with slapd on a server with a known IP address. OpenLDAP 
has been build with the rdns lookups disabled.

When I use ldapsearch (or any client which uses the openLDAP client 
libraries) to perform a search on the database at this server (by 
specifying the IP address of the server), the client appears to attempt 
to perform a DNS lookup before the bind operation (an ethereal trace 
shows this).

Is there any way to prevent this? It slows down the search considerably.

The same test has been performed with clients that do not use the 
openLDAP client library and the DNS lookups do not occur.

Initially when looking through the openLDAP library source, I suspected 
something with getaddrinfo() called in ldap_connect_to_host() in the 
os-ip.c module, however the AI_CANONNAME flag in the hints structure 
appears to be initialized not to get the host name.

Regards,
Geoff