What is the recommended step to resolve an Error 1033 during

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Grade: Education Subject: Support
What is the recommended step to resolve an Error 1033 during Argo Tunnel setup?
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The recommended first step is to verify that your firewall is not blocking outbound traffic to Cloudflare's IP ranges (which can be found on Cloudflare's website). Next, confirm your DNS is resolving correctly to Cloudflare’s IP addresses. If those are verified, proceed with reviewing Argo Tunnel's configuration for any errors.