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A PCI-DSS audit found several external vulnerabilities in the e-commerce application. The source code review and patching will take 4 weeks. A quick fix could be to implement:
an UTM security appliance
a Web Application Firewall (WAF)
a PCI-DSS compliant network firewall
a reverse proxy
A WAF can protect the e-commerce application without having to change the application itself. Rules can be implemented on the WAF in order to protect the e-commerce application against the exploitation of the external vulnerabilities. Source: https://www.owasp.org/index.php/Category:OWASPBestPractices:UseofWebApplication_Firewalls ; A4.1 Main benefits of WAFs. [BC] All true, but a WAF cannot correct all vulnerabilities. I changed the wording from "would" to "could".
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