Free engineer tool

Inbound Port Reachability

We try to reach your public address from the internet on the ports you choose. This tells you whether a listener at your location would be reachable. A streaming crew usually pushes outward and does not need inbound ports open. TCP only. No signup required.

Network path

Port check

Which inbound ports answer at the room from the internet. A TCP connect from our probe host to the target; open, closed or filtered per port.

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Ports
Open
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Target
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Resolved
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No measurement yet. A few seconds. No account needed.

Your runs of this tool

A port shows open when the probe completes a TCP handshake, closed when the host refuses, filtered when nothing answers. Something at the room listening for the internet needs every named port open.

What to do next

Test the next thing

No inbound ports reachable is the normal state of most connections. It only matters if you need to receive a stream at this location.

URL Builder. Parse and validate SRT, RTMP, and WHEP ingest URLs before they hit your encoder.

Run URL Builder

The rest of the toolbox

11 free tests grouped by the job you arrived with: your connection, the network path, the stream setup, the programme timing.

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