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This guide forwards acme.com/blog to Notra with proxy rules in Netlify’s _redirects file, where a rule with the status 200 proxies a path to another origin and the ! forces the rule even when a file exists at that path. Read the steps on every platform first, and replace acme.notra.site with the Notra address on your site’s Domains page.
1

Add the proxy rules

Put a _redirects file in the folder Netlify publishes (often public/ or dist/), or add the rules to an existing one:
Netlify uses the first rule that matches, so put these above any catch-all rule like /* /index.html 200.
2

Deploy and check

Deploy, open https://www.acme.com/blog/_notra/probe.txt to confirm the rule works, then click Check on the domain in Notra.
Last modified on October 8, 2026