Proxy Detection
Am I behind a proxy or VPN?
IPCombo measures the actual latency to popular sites from your browser. If your international latency is suspiciously high or low, you're probably behind a proxy or VPN.
Run a check to see the verdict.
Signals we look at
Latency to China targets, latency to US/EU targets, WebRTC srflx vs public IP, and the failure pattern of blocked sites.
Latency to China targets, latency to US/EU targets, WebRTC srflx vs public IP, and the failure pattern of blocked sites.
Routing regimes
smart_routing = direct + proxy both work, global_proxy = everything goes through a proxy, direct_only = no proxy detected, partial_routing = mixed.
smart_routing = direct + proxy both work, global_proxy = everything goes through a proxy, direct_only = no proxy detected, partial_routing = mixed.
Frequently asked questions
How can a browser detect a proxy?
It can't read the proxy config. Instead we infer from behavior: how long it takes to reach a Chinese site vs. a US site, and whether the public IP matches the WebRTC srflx.Why is my latency high even with a fast proxy?
The latency is measured from your browser to the target. A proxy adds at least one hop and one network segment. Expect at least 50-200ms additional overhead.Is the detection always accurate?
No. Some networks are configured to look like direct connections (e.g. transparent proxies). IPCombo reports the most likely verdict, not a certainty.