middle.network
Health check

TCP traceroute

Trace the path a real connection to this port takes.

Tested from around the worldPlain English + technicalFree, no sign-upBeta
Good to know: Shows whether the port is reachable and how many hops away it is. Many routers along the way don’t reply, so the middle of the path is often hidden.
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About the TCP traceroute

Trace the route to a host using TCP packets on a port such as 443, which firewalls allow when they block normal traceroute.

Every result comes in two styles: plain English for everyone, and the exact technical detail for engineers, with the raw JSON one click away.

Questions

Firewalls often drop ICMP and UDP but pass port 443.