When Cloudflare Becomes Your SEO's Worst Enemy

Cloudflare is one of the most popular services for speeding up and protecting websites. Over 20% of all internet traffic flows through their servers.

That alone makes it worth talking about the problems they can cause when used without proper knowledge.

I'm a huge fan of Cloudflare. They offer some of the best tools on the market, many of them completely free. But today I want to focus on one specific area: their CDN/proxy features.

Specifically, I'll look at Bot Fight Mode, Super Bot Fight Mode, and Under Attack Mode.

These Modes Should Help You, But They Don't Always

Bot Fight Mode and Super Bot Fight Mode are great features when used properly. In simple terms, they reduce malicious bots that crawl your website. Bots that, for example, overload your infrastructure.

Bot Fight Mode is the basic version included in the free plan. It's a simple on/off toggle with no configuration options. You can't whitelist specific bots or create exceptions.

That makes it risky to leave on for extended periods. It may challenge legitimate traffic you actually want on your site.

Super Bot Fight Mode is part of the paid plans. It gives you more control. You can configure how your domain responds to specific types of traffic separately.

This means you can allow verified bots like Googlebot while still blocking suspicious ones. However, the mode itself cannot be customized or reconfigured via WAF custom rules. What you can do is create custom rules with a Skip action to bypass Super Bot Fight Mode on specific paths where you want bot traffic.

The last mode worth mentioning is Under Attack Mode. This is the strongest option. It's designed for DDoS attacks and forces every visitor through a JavaScript challenge before reaching your site.

According to Cloudflare's own documentation, Under Attack Mode is designed not to block search engine crawlers (reality is often different). However, in practice, the JavaScript interstitial can still cause problems for bots that don't execute JavaScript. That includes most AI crawlers.

The key takeaway? Even Cloudflare admits these products may challenge good traffic. In practice, Bot Fight Mode and Super Bot Fight Mode often interfere with legitimate crawlers, even when they shouldn't. Under Attack Mode has built-in protections for search engines, but it doesn’t always work properly and it should still only be activated during an active attack. Not left on permanently.

Wiped Out from Google Overnight

When these modes are left on or misconfigured for too long, they trigger a serious problem for your business.

Once Cloudflare starts blocking or challenging requests from Google, it will slowly begin deindexing your pages one by one. This applies to crawlers from other search engines and AI tools too.

When you serve Googlebot an error status code once, it's not a big deal. Google will check your website again later.

But once you block these requests for a longer period, Google starts removing URLs from its index completely. It also reduces your crawl budget. Google will visit your site less often going forward.

The slower the response, the more invisible you become.

Recovery and the Real Problem

Based on my experience, recovery is usually not the biggest challenge. It typically takes up to six months to fully bounce back from a mistake like this. Often it's significantly faster.

It really depends on how long the blocking issue stayed in production.

The real problem is financial.

It all comes down to how much revenue your company generates through organic traffic. If organic brings in low single-digit percentages of your income, your company will probably survive the hit.

But for SaaS companies or e-shops where organic can easily account for over 50% of revenue, the impact can be devastating.

Monitoring Is Crucial

Proactive technical SEO monitoring can save you from situations like this. You have three options.

The first, and the worst, is ignoring proactive monitoring entirely. You accept higher risk and hope nothing goes wrong.

The second is manual monitoring. Open Google Search Console every day and check your performance, indexation, and crawling data. It works, but it requires discipline.

The third, and the easiest, is to use automated services that work like “insurance”. They notify you immediately when something unusual happens with your website. You take action before a small issue becomes a major crisis.

One of the tools I personally developed for this type of technical SEO monitoring is VitalSentinel. But even Ahrefs and others are pretty good solutions.

Start monitoring before the first problem happens.