Why pay for this, when Sans GIAC engineer did a comparison against Cisco and many others which you have to pay for - when in fact you can save a lot of cash, by simply using Quad 9 as a consortium. It effectively filtered out 99.9 % of all threats, without having to pay for it and it is regularly updated and the information used for Threat Intelligence purposes too:
https://www.quad9.net/
Regards
Caute_cautim
