Flint – Web-based Firewall Rule Scanner
Flint examines firewalls, quickly computes the effect of all the configuration rules, and then spots problems so you can: CLEAN UP RUSTY CONFIGURATIONS that are crudded up with rules that can’t match traffic. ERADICATE LATENT SECURITY PROBLEMS lurking in overly-permissive rules SANITY CHECK CHANGES to see if new rules create problems. Flint is absolutely free. [...]
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