Why your proxy keeps getting blocked
When a proxy gets blocked, the line usually still works. The problem is how the target scores the IP, how many others share it, how fast you send, or whether your fingerprint disagrees with your address. Diagnose in that order.
A block rarely means the proxy is down. It means the target scored your traffic low. Four causes explain most of it: the type of IP, other people's history on it, your request rate, and a fingerprint that disagrees with the address.
The type of IP
Datacenter ranges are blocked first. Residential and mobile ranges are trusted more. If your target is strict and you are on a datacenter IP, that is the answer before anything else.
Other people's history
On a shared pool, the reputation is the sum of everyone's behaviour. One careless user can get a range throttled. A dedicated line carries only your traffic, so the reputation is yours to keep.
Your rate and pattern
Bursts and perfectly regular intervals both look automated. Slow down, add jitter, and spread load. The mechanics are in how to avoid getting blocked while scraping.
A fingerprint that disagrees
If your headers or TLS say one thing and your IP says another, the mismatch flags you. Consistency across the address, headers, and behaviour is what keeps a line trusted.
The fix order
Work down the list and stop when the blocks stop. Most people skip step two and pay for it.
- Confirm the line still connects.
- Check whether the IP is shared or on a flagged range.
- Lower your rate and vary the timing.
- Align headers and fingerprint with the IP.
- Only then change the line or the provider.
When the line is fine
If a simple IP check works and only one site blocks you, the line is fine and the site is scoring your pattern. Test a proxy before you rely on it separates a line fault from a site block, and what to check when a proxy will not connect covers a connection that refuses outright. If the block is really the site refusing your region or network, how to bypass website blocks covers that side.
Is a blocked proxy broken?
Usually not. Most blocks are a reputation or pattern problem, not a fault. Check whether the line still connects before blaming it.
Do shared proxies get blocked more?
Yes. A shared IP carries everyone's history, so one bad user can spoil it for the rest. A dedicated line avoids that.
Why does it work on one site and fail on another?
Each site scores traffic differently. A stricter site may block a pattern that a lenient one ignores.
Should I change provider when I get blocked?
Only after checking the IP type, your rate, and your fingerprint. Changing the line rarely fixes a fingerprint mismatch.