Free tool
Is that port actually open?
A host, a port, and a connection attempt from every location we run. You get an answer per network, which is the one that tells a firewall rule apart from a service that never started.
Check whether a port is open
A host, a port, and a connection attempt from every location we run. Open from some places and not others usually means a firewall rule rather than a service that is down, and that is a very different afternoon.
| Location | Network | Result | Time |
|---|
We connect and hang up. Nothing is sent to the service and nothing is read back.