Network Tools
Test reachability and routing from the public internet: ping a host for latency and packet loss, trace the path with traceroute, check which TCP ports are open, and find out who operates an IP address.
The probes run from our servers, so they show what the outside world sees, which is often different from what you see inside your own network or VPN.
5 free network tools
Guides: Network Protocols
- How NAT Actually WorksSource NAT, destination NAT, and PAT/masquerade; the conntrack table that makes it stateful; hairpin NAT, port exhaustion, and why NAT breaks some protocols.
Checking a whole domain? The Super Scanner runs every DNS, email, website and security check at once and gives one score.