CIRCUITO
CARIOCA TI · DOCUMENTATION
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Network diagnostics

Online Ping

Test ICMP reachability and latency of a public IPv4 or IPv6 target from the Circuito Carioca TI server.

PingICMPIPv4IPv6Latency

Ping ICMP

Sends four ICMP Echo Requests from the portal server to one validated public IP.

Examples: 1.1.1.1, 2606:4700:4700::1111 or example.com
ICMP

A failed ping does not always mean the destination is down

ICMP Echo traffic may be blocked, filtered or rate-limited while web, DNS, SSH or other TCP/UDP services remain reachable. Ping should therefore be interpreted as one diagnostic signal, not as definitive service availability.

DNS

Hostnames are resolved before the system command runs

When a hostname is submitted, the tool obtains its IPv4 A and IPv6 AAAA addresses and rejects the entire target if any resolved address is non-public. The ping process receives only a validated literal IP, reducing the risk of DNS changes being used to reach internal infrastructure.

IPv4 / IPv6

Both IP families are supported

The Linux iputils ping implementation supports explicit IPv4 and IPv6 operation. If a hostname has both public families, this tool currently prefers IPv4 for compatibility with typical hosting environments; an IPv6-only target is tested with IPv6.

ORIGIN

The measurement represents the portal server

Latency and reachability are measured from the server hosting Circuito Carioca TI. They do not represent the route, latency or filtering conditions of the visitor’s own internet connection.

FAQ

Frequently asked questions

Where does the ping originate?+

It originates from the server hosting Circuito Carioca TI, not from your browser, computer or local internet connection.

Does no ping reply mean the host is offline?+

No. ICMP Echo may be blocked or rate-limited while application services continue to work normally.

Does the tool support IPv6?+

Yes. Literal public IPv6 addresses and IPv6-only public hostnames can be tested when the hosting server has IPv6 connectivity.

Can I ping a private or local address?+

No. Private, loopback, link-local, reserved and other non-public addresses are intentionally blocked to protect internal infrastructure.

What happens when a hostname resolves to several IP addresses?+

Every returned public A and AAAA address is validated first. The tool then selects one validated address for the ICMP test, currently preferring IPv4 when both families exist.

Why is the hostname not passed directly to ping?+

Resolving first and pinging a validated literal IP avoids a second DNS lookup inside the system command and reduces DNS rebinding or pinning risk.

Why can latency differ from a ping executed on my computer?+

The server can use a completely different provider, route, geographic path and peering relationship than your own connection.