The goal is to block listed IP address with less time consuming. i have a list of 400000 IPs, i need block them on nginx , i can use geo modules and defind vars like: geo $bl { *** } if ($bl = 1) { return 403; } also i can get developer to write module to work like Geo modules, create variable based on IP if IP is in Blacklist or not. now i have questions. what is fastets ?(Geo or cusby pchandran - Other discussion