All about proxies
TCP/IP fingerprints and proxy choice
Some filters look at more than the IP list. They also look at how the TCP/IP stack behaves. The practical response is to choose the Premip product that already matches the traffic you need.
What this is not
Premip does not provide tools to fake OS fingerprints or rewrite packet stacks. If a destination is picky, change proxy type or client, and re-test.
What to try first
Reproduce with curl, then with the real client. If curl works and the app fails, the issue is the app settings (protocol, DNS, TLS), not the IP alone.
Product matching
Use mobile when the destination expects carrier traffic. Use residential for general websites. Use datacenter when hosting IPs are accepted.
Instructions
1. Capture a failing request
Save status, headers, and whether the body is a block page.
2. Switch product, keep the URL
Retry mobile, then residential, then datacenter with the same credentials pattern.
3. Fix the client if IPs already work
Check HTTP vs SOCKS5, proxy DNS, and timeouts.
Related sections
Why carrier networks matter for mobile proxies
Mobile exits share carrier infrastructure. That is expected, and it is why some destinations prefer them.
HTTP 522 connection timed out
522 means the edge or origin did not complete the connection in time. Isolate where it stalled.
How to use cURL with a Premip proxy
The fastest way to prove credentials work before you configure a larger client.
All about mobile proxies
Carrier-network IPs for workflows that need mobile traffic and dashboard-controlled rotation.
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