I want to disable reverse DNS in Apache 2. I have done the following steps:
In apache2/apache2.conf file ,HostnameLookups is set as OFF
Tcpdump session confirmed thatApache was doing double reverse lookups even though the HostnameLookupsdirective was clearly turned off.
No hostnames insites-available. The problem still remains.
UPD: version of apache is
dpkg -l | grep apache2
ii apache2-mpm-prefork 2.2.16-6+squeeze4 Apache HTTP Server - traditional non-threaded model
ii apache2-utils 2.2.16-6+squeeze4 utility programs for webservers
ii apache2.2-bin 2.2.16-6+squeeze4 Apache HTTP Server common binary files
ii apache2.2-common 2.2.16-6+squeeze4 Apache HTTP Server common files
Compiled in modules:
I think mod_security is not present.