Proxy errors and how to fix them
Every page in this section answers one error. The first question in all of them is the same: did the proxy refuse the request, or did the target? Get that right and the fix is usually five minutes away; get it wrong and you can rotate IPs for a day without moving.
5 articles
HTTP 403 Forbidden: What Causes It and How to Fix It
403 means the request arrived, was understood and was refused. Which layer refused it decides the fix — and rotating IPs is the right answer far less often than people assume.
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HTTP 429 Too Many Requests: How Rate Limits Work and How to Survive Them
429 is the one error that gets worse the harder you try. Read the headers, back off properly, and spread load across identities instead of hammering one.
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407 Proxy Authentication Required: Every Cause and Its Fix
The one proxy error that is entirely on your side of the connection — and the handful of clients that cause it even when your credentials are perfect.
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Cloudflare Error 1020 Access Denied: What Triggers It and How to Get Past It
1020 is not a rate limit and not a CAPTCHA — it is a rule someone wrote, matching something about your request. Finding out what it matched is the whole job.
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Proxy Error Codes Explained: 407, 429, 502 and the Rest
Which errors come from the proxy and which from the target, why that distinction saves hours, and the specific fix for each code.
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