What is mod_setenvdnsbl The mod_setenvdnsbl is an Apache module that looks up DNSBL requests for target IP address and set those results to environment variables. With this module, you can control access permission of black listed hosts. Download files mod_setenvdnsbl-0.1.tgz 4686 Bytes How to install Download and extract mod_setenvdnsbl-0.1.tgz. Edit Makefile to change APXS variable to your apxs'