COLITU LAB21 of 21 probes online

Network

AS16276 · OVH SAS

🇬🇧 United Kingdom · LondonDatacenter2,993 tests in 24 hours
JSONAPI

Network fingerprint

What this network does to VPN traffic, read from comparing kinds of tests. “Observed” means the measurements are consistent with the behaviour — not proof of intent.

Network classification

Hysteria2Available
VLESS RealityDegraded
VLESS XHTTPDegraded
TrojanDegraded
ShadowsocksDegraded
Server ports (plain TCP)100%

Observed behaviour

Server addresses unreachable (IP or port blocking)Share of plain TCP connections to the servers' ports that failed. Measured: 0.0% failed over 1,296 tests.Not observed
TCP transports fail although the port answersTunnel failure rate of TCP transports minus the failure rate of plain TCP connects to the same ports. A gap points at inspection of the traffic, not at blocked addresses. Measured: a gap of 3.5 points over 1,296 tests.Inconclusive
QUIC/UDP transports fail more often than TCP onesFailure rate of Hysteria2 (QUIC over UDP) minus that of the TCP transports to the same servers. Measured: a gap of 0.0 points over 317 tests.Not observed
Plain DNS over UDP to public resolvers disruptedFailure rate of DNS queries over UDP minus the same queries over TCP to the same public resolvers. Measured: a gap of 0.0 points over 24 tests.Not observed
HTTPS to neutral websites fails without a VPNFailure rate of direct HTTPS requests to well-known neutral sites. Shows whether the network itself works when tunnels fail. Measured: 0.0% failed over 36 tests.Not observed

Basis

Samples2,993
Window24 hours
Last updated3 h ago

How each line is computed: methodology.

Transports

Tunnel tests from this network over the last 24 hours.

TransportSuccessMedian connectTestsStatus
Hysteria299.7%208 ms317Available
VLESS Reality96.3%273 ms324Degraded
VLESS XHTTP96.6%275 ms324Degraded
Trojan96.3%304 ms324Degraded
Shadowsocks96.6%213 ms324Degraded

Success over time

JSONAPI
0%25%50%75%100%12:0018:0000:0006:00
Data table
Time (UTC)Hysteria2VLESS RealityVLESS XHTTPTrojanShadowsocks
10 Oct, 07:00–08:00 UTC100% (26)96.3% (27)96.3% (27)96.3% (27)96.3% (27)
10 Oct, 08:00–09:00 UTC100% (80)96.3% (81)96.3% (81)96.3% (81)96.3% (81)
10 Oct, 09:00–10:00 UTC100% (79)96.3% (81)96.3% (81)96.3% (81)97.5% (81)
10 Oct, 10:00–11:00 UTC98.7% (79)96.3% (81)97.5% (81)96.3% (81)96.3% (81)
10 Oct, 11:00–12:00 UTC100% (53)96.3% (54)96.3% (54)96.3% (54)96.3% (54)

Detected changes

No changes detected on this network.

Vantage points on this network

London (datacenter)
since 10 Oct 2026, 07:43 UTC
3,000
measurements
Online