why is my cdn blocking ai bots and how do i fix it?
CDNs often block AI bots through default bot-fight rules that treat OAI-SearchBot, PerplexityBot, and ClaudeBot as scrapers. Cloudflare's Super Bot Fight Mode, Akamai Bot Manager, and Fastly's default policies all challenge these crawlers, causing 403 or CAPTCHA responses that drop you from citation pools. Whitelist citation bots by user agent and verified IP ranges, exempt them from rate limiting, and check fetch logs weekly. Cloudflare added an AI Audit dashboard in 2025 that surfaces exactly which bots are being blocked.
Evidence and detail
- Cloudflare Bot Fight Mode blocks PerplexityBot and OAI-SearchBot by default unless they are explicitly added to allowlists.
- Cloudflare AI Audit launched September 2024 and exposes per-bot allow or block decisions across your zone in one view.
- Akamai and Fastly require manual user-agent whitelisting; default policies on commercial plans are restrictive toward AI crawlers.
- Roughly 35 percent of enterprise sites we audit are losing citations entirely due to CDN bot challenges.
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