Companies are struggling with firewall sprawl, in which firewalls become more numerous and, in some cases, disparate. Companies like AlgoSec, RedSeal, Tufin, and Skybox all are attempting to crack the enterprise firewall configuration equation. Many companies don’t test their new firewall rules and configurations before they deploy them, experts say. The only reason there is a market for 3rd party firewall management tools is because “the firewall vendors screwed it up,” Rothman says.”]
Source: https://www.darkreading.com/analytics/why-don-t-firewalls-work-