This page runs a few short checks against a server Trevillyan Labs controls, to find out what this laptop's network permits. Nothing is installed, no account is needed, and no work data is involved — the checks send only timing information about themselves.
This takes about 75 seconds — please keep this tab in front while it runs, since browsers slow down timers in background tabs.
The browser cannot see this part. These are the details our server observed about the connection when this page was requested — the strongest evidence of whether something sat in the middle.