You can check the current version of apache by running
httpd -v
If you wish to update your 1.3 version of apache to the most recent, run the following:
cd /usr/local/directadmin/customapache ./build clean ./build update ./build apache_mod_ssl
If you're using apache 2.x, use ”./build apache_2” isntead of apache_mod_ssl. This should update both the configure options and the version of apache to the most recent version. Once the update has completed, you'll need to restart apache:
RedHat:
/sbin/service httpd restart
FreeBSD:
/usr/local/etc/rc.d/httpd restart