Latency is an HTTP round trip through your current connection. Failed probes are not an ICMP packet-loss measurement.
IP & connection
—- IPv4
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- IPv6
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- Browser DNS
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- Page TLS handshake
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- Test data transferred
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IPv4/IPv6 are checked with ipify. A different IPv6 route needs investigation; this is not a definitive DNS or IPv6 leak test.
Server route · ICMP
Server egressResults appear after a test.
Real ICMP loss from the server to public resolvers. No reply can also mean ICMP filtering; it does not prove VPN failure.
UDP & VPN gateway
Server & local gatewayResults appear after a test.
UDP DNS probes check UDP/53 replies from the server and forwarding through the local VPN gateway. They do not measure browser-to-VPN UDP or UDP throughput.
Server DNS, TCP & TLS
Server routeResults appear after a test.
These are server-side checks. An HTTP response does not guarantee that an app, account or region is supported. VPN WARP routing can produce different results.