Various configurations files are located at different places, there structure is defined below.

Litespeed

/usr/local/lsws/conf/httpd_config.conf
/usr/local/lsws/conf/phpconfigs/php53.conf
/usr/local/lsws/conf/phpconfigs/php54.conf
/usr/local/lsws/conf/phpconfigs/php55.conf
/usr/local/lsws/conf/phpconfigs/php56.conf
/usr/local/lsws/conf/phpconfigs/php70.conf

Virtual Hosts

/usr/local/lsws/conf/vhosts/

FTP

/etc/pure-ftpd
/etc/pure-ftpd/pure-ftpd.conf

DNS

/etc/pdns
/etc/pdns/pdns.conf

*Note: When editing the configuration files, please proceed with caution as any misplaced rule can break the webserver.