DNS

nslookup myip.opendns.com resolver1.opendns.com

I support clients that have been using Quad9 (9.9.9.9) and OpenDNS to filter requests that lookup DNS names associated with BotNets and other shenanigans. The problem we ran into is…

Article DNS security filtering Quad9 is a free offering from an IBM led group of security organizations. OpenDNS made this type of service popular and Quad9 builds on that by…