robots.txt is a request, not an enforcement mechanism. A crawler that ignores it needs a block at the server or CDN layer. Rules are case-sensitive on the path and matched against the user-agent token, not the full user-agent string.
Consider blocking based on your content strategy. That guidance follows this operator's least reassuring crawler, DotBot, rated caution, because allowing an operator allows every crawler it runs. The SEO impact score for blocking is 2/10, where 10 means blocking costs you the most visibility.
How do I block Moz in robots.txt?
Add the following to robots.txt at your domain root: User-agent: DotBot then User-agent: Rogerbot then Disallow: /. One Disallow line covers all 2 user-agent tokens.
Does blocking Moz hurt my search rankings?
The highest-impact crawler here is Moz Campaign Crawler, rated: Low - No SEO ranking impact. Google's own ranking crawler is Googlebot, which this operator does not run, so blocking Moz does not by itself remove you from Google's index. What it can change is whether AI assistants and analytics tools can read your pages.
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