How much does WAF protection cost at scale?

AWS WAF: $5/month per WebACL + $1 per million requests + $0.60 per rule group million request. At 100M requests/month with 5 rule groups: $5 + $100 + $300 = $405/month. Cloudflare WAF (Pro): $20/month unlimited rules. For high-traffic sites, Cloudflare is typically 80-90% cheaper than AWS WAF.

What WAF rules should you enable first?

Priority order: SQL injection, XSS, path traversal, command injection (OWASP Core Rule Set). Enable in detection mode first for 30 days to measure false positives. Tune rule-by-rule before switching to blocking mode. Common false positives: Base64-encoded form fields, legitimate query strings with SQL keywords.

WAF Request Analysis Cost Calculator

Calculate WAF request analysis cost and false positive impact at scale. Compare managed WAF vs self-hosted ModSecurity for high-traffic applications.

Networking

Algorithms

Binary & Number

Systems

Dev Metrics

IP Subnet Calculator

IP Address

CIDR Prefix

Network

192.168.1.0

Broadcast

192.168.1.255

Subnet Mask

255.255.255.0

First Host

192.168.1.1

Last Host

192.168.1.254

Usable Hosts

254

Binary breakdown:

IP: 11000000.10101000.00000001.00000000

Mask: 11111111.11111111.11111111.00000000

Net: 11000000.10101000.00000001.00000000

How to Use

Enter the values for the patient or scenario you are assessing. Calculate WAF request analysis cost and false positive impact at scale. Compare managed WAF vs self-hosted ModSecurity for high-traffic applications. Use the waf cost analysis result to inform your clinical assessment.

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