ActivityRoute to configure
Record browser trafficBrowser → recorder; required onward proxy on that path
Run generated HTTP testJMeter HTTP client → intended upstream/destination

A successful recorded page says nothing about the later client's proxy/account settings. Inspect those before executing the plan.

Keep recorder listener, upstream proxy and application destination as three addresses. A local recorder port is neither the application's service port nor a public exit for unrelated machines; the recording browser needs reachability within its intended boundary.

HTTPS interception during authorized recording requires the temporary browser trust arrangement. For an mTLS application, the recorder also needs its authorized client identity for the onward connection. Reachability and upstream authentication remain separate, and that recording CA is not a permanent ordinary-browsing requirement.

Restore the browser's intended settings after capture. The next test run must then be judged on JMeter's own route.

Artiglyn mynjee