{{ trace(page, file, notag, dir=bistrace, ip=127.0.0.1) }}
This Trace tag directs that trace output will be appended to every HTML page, and will also be written to the trace file in a directory named bistrace-note that, on Windows, this directory is relative to the Windows temporary directory, and must exist. The notag option causes TraceDump tags in the stencil file to be ignored and page trace output is only performed if the request originates on the server running BIS via the localhost alias (always 127.0.0.1).
Note that specifying 127.0.0.1 (or any IPv4 loopback address) also enables tracing from ::1 (the IPv6 loopback address), and vice-versa.