MTR Live

Real-time traceroute with ICMP and TCP

60s
ICMP Traceroute
Start MTR to see ICMP traceroute results
ICMP vs TCP Traceroute
ICMP (Default)
  • • Uses ICMP Echo packets (like ping)
  • • Works on most networks
  • • May be blocked by firewalls
  • • Best for general network diagnostics
TCP (Port-based)
  • • Uses TCP SYN packets to a specific port
  • • Often passes through firewalls better
  • • Shows different routing for TCP traffic
  • • Useful for web server diagnostics (port 80/443)
Tip: If ICMP shows timeout (???) at certain hops but TCP doesn't, those routers likely filter ICMP traffic. Compare both results to get a complete picture of your network path.
TCP TraceroutePort 443
Start MTR to see TCP traceroute results