Local Network Access · timing side channel

LNA port probe

A controlled demonstration of how a page can infer local TCP reachability from the time a browser request remains pending behind an LNA permission prompt.

Probe configuration

01 / CONTROL

Loopback target

Probe method

Ports and ranges

Exclude Linux ephemeral ports 32768–60999 to prevent TCP self-connection false positives on this demonstration host.

Observed candidates

TIMEOUT 2000msBATCH 120

Probed

Open candidates

Scope

8,024

READY

Select a constrained range and start the probe.