IP & Network
Hop-by-hop path and optional MTR summary.
Traceroute shows a hop at each TTL. Stars (*) mean that hop did not reply to ICMP, not that the path is broken.
MTR samples several rounds and reports loss. Output comes from Linux traceroute or mtr; if neither is installed you get an error.
Early hops are often the host’s gateway. Loss in the middle often means that hop rate-limits ICMP; if later hops reply, the path is not broken.
The target may filter traceroute. Check ping and HTTP separately.
When one traceroute is not enough and you want a loss percentage over several rounds.
Depends on the server traceroute default. Many Linux installs probe around UDP 33434.
RFC1918 and loopback are refused. Public addresses only.
Classic traceroute shows hop IPs. Use the ASN tool or whois for the operator.