Is this port open from the internet?
Name a host and port to see whether a connection reaches it from the internet. It runs once from US East with a 10 second cap, the same runner a monitor uses.
How to read this
- Connected to
- The address and port the connection actually reached.
- Latency
- How long the connection took to establish.
Questions
Is this a scan?
No. It makes one connection to the port you name; it never probes any other port.
Why is a private address refused?
Private and loopback addresses are refused: a check from outside your network can say nothing useful about them, and hostnag never dials into anyone's network on purpose.
Related
Read
Ping is not uptime monitoring: what ICMP proves, what a TCP connect proves, and why a failure needs a second witnessWhat an ICMP reply proves and what it misses, why a TCP connect on the right port is the first real test, and how a failure is confirmed before anyone is paged.How to monitor an office internet link from both ends: a connection from outside, a ping from inside, five verdictsA TCP connect to the gateway from outside plus a ping from a device inside, so a filtered port, a dead line and a new public address each read differently.
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