When a proxy works but the site blocks you, the connection is rarely the problem. The proxy is up, the IP loads in your IP check, and the site still shows an error, a captcha loop or a "suspicious activity" page. Something else about the visit looks off.
Go through the nine checks below in order. Each one says how to check and what to do.
Test everything inside the profile that uses the proxy, not in your normal browser.
Key takeaways
- A working proxy only means traffic flows. Sites also look at leaks, timezone, language, IP history and your cookies.
- Start with the cheap checks: DNS, WebRTC, timezone and language.
- Match the proxy type to the site. Hosting IPs on consumer platforms and rotating IPs for logins are common causes.
- Don't carry old cookies and history from another IP or country into a new proxy.
- Some sites block many residential IPs no matter what you do.
The nine checks
1. DNS leak
If your browser asks your own provider's DNS servers about the site, the site's side may see a location that doesn't match the proxy.
Check: open browserleaks.com/dns in the profile. None of the DNS servers should belong to your own provider.
Do: follow the steps in the DNS leak check.
2. WebRTC leak
The browser can report your real public IP through WebRTC, next to the proxy IP.
Check: open browserleaks.com/webrtc in the profile. Your real IP should appear nowhere.
Do: switch the profile's WebRTC mode to the one that uses the proxy's IP. See the WebRTC leak test.
3. Timezone, language and location that don't match the IP
A Berlin IP with a New York timezone and a browser set to another language looks odd to a site.
Check: compare the IP's country and city with the profile's timezone, language and location settings.
Do: set them to follow the IP. The steps are in match timezone, language and location to your proxy.
4. IP reputation and fraud score
Some IPs have a history: earlier users, abuse reports, a listing on a block list.
Check: look the IP up on a reputation or fraud score page before you log in. The guide on checking an IP before use shows what to read.
Do: if the IP looks poor, pick another one. A sticky proxy is chosen one IP at a time, so you can compare a few.
5. Wrong proxy type for the site
Hosting (datacenter) IPs are fast and cheap, but consumer platforms often trust them least. Rotating IPs change on every request, which is fine for checking pages and bad for a login that must stay in one place.
Check: ask what the site expects. A shop, a social platform or an ad account expects a home or mobile connection. A price check on a public page doesn't care.
Do: use residential or mobile for consumer platforms, and a sticky or Static ISP IP for logins. The which proxy for which job guide lays this out.
6. Old cookies and history from a different IP or country
If the profile was used before, it carries cookies, saved logins and history from the old IP. A site that remembers a login from Spain now sees the same browser in Canada.
Check: was this profile used on another IP, or cloned from one?
Do: start a fresh profile for the new proxy, or clear its cookies and storage first. Log in once from the new location and let the site run its normal verification.
7. Several accounts or profiles sharing one IP
Some platforms look closely when many logins come from one address.
Check: list which profiles use this proxy.
Do: give each account or client its own IP. Use the platform's own team tools where they exist, such as staff accounts or business managers, and follow its rules. A proxy doesn't make anything against a platform's terms OK.
8. The IP changed mid-session
A sticky proxy keeps its IP up to 24 hours. It runs on a real device that can go offline, and the ISP can change the address, so the IP can change earlier. A site that sees one login jump to another IP may ask you to verify or log you out.
Check: open an IP check in the profile now and compare it with the IP you logged in from.
Do: for accounts you open for weeks, use Static ISP: one IP for 7, 30 or 90 days. See Static ISP vs residential.
9. The site's database shows a different location
Sites use their own location databases, and those databases often disagree with each other. The listing says one city and the site thinks another.
Check: compare what the site shows (a currency, a store page, a language) with the city on the listing.
Do: read why sites show the wrong location for a proxy and pick an IP in a place where the databases agree.
Common mistakes
- Changing five things at once, so you never learn which one fixed it.
- Testing in the normal browser window instead of the profile.
- Reusing a profile with years of history on a new IP.
- Judging an IP only by one site's reaction.
- Buying a second proxy before checking leaks and settings, which cost nothing.
When it isn't you
Some sites block many residential IPs, whatever you set up. A different IP may pass, or none may. This is a limit of the site, not a fault you can fix.
On refunds: a sticky proxy can be refunded to the balance only within its first hour, and only if a live test of it fails or its IP or location disagrees with the listing. A block on one site is not a refund reason, and a high fraud score alone isn't either. Static ISP and Rotating have no refunds, so test a sticky proxy first through the catalog.
If you are stuck, send the details to support on Telegram. Real people there can look at a case with you.
FAQ
Why does my proxy work on one site but not another?
Each site runs its own checks and has its own view of the IP. One may accept the IP while another has it on a block list or dislikes the proxy type.
Can a leak get me blocked even if the IP is good?
It can add to a mismatch. A leaked DNS server or WebRTC address in another country sits next to the proxy IP, and that conflict is what gets noticed.
Does a new IP fix a block?
Sometimes, when the problem was that one IP. If the cause is your settings or an old profile, the next IP gets the same result.
Is a high fraud score always the reason?
No. It is one signal among several, and scores differ between services. Check the rest of the list too.