Web Application Firewall: Why Default Rules Aren't Enough for Fintech

Tue, 02 Jun 2026 00:00:00 +0000

A WAF running on default rules is better than no WAF. I’ll say that upfront, because what follows isn’t an argument for ripping out what you have. It’s an argument for understanding what it actually covers.

The default rule sets that ship with enterprise WAF platforms are designed to protect a generic web application against known, well-documented attack patterns. They do that reasonably well. What they don’t do is account for what makes your fintech platform different from a generic web application: the payment flows, the regulated data, the authentication patterns, the API surface, and the specific attack vectors that come with operating in a sector attackers find financially lucrative.

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Web Application Firewall: Why Default Rules Aren't Enough for Fintech