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Observe DNS queries issued by a Windows computer

Compare DNS answers across selected resolvers

View DNS answers on a global resolver map

Discover domain-related hosts and DNS infrastructure

Google's DNS, mail and browser troubleshooting toolbox

A DNS command-line client with several encrypted transports

A self-hosted DNS sinkhole for network-wide filtering

Inspect browser IP, DNS and WebRTC address exposure

Explicit DNS queries over plain and encrypted transports

Inspect email transport and authentication setup

Graphical OpenVPN client with DNS and scripting controls

Compare domain answers across public DNS resolvers

Look up mail routing and investigate server DNS

A configurable DNS filter for devices and networks

Query DNS records from lists with resolver and wildcard controls

Script DNS capture, parsing and replay pipelines

Review a sample email's authentication and spam signals

A public DNS resolver with malicious-domain blocking

Linux SSL VPN server with enterprise authentication integration

Cloud DNS filtering with content and reporting controls

Authentication management for on-premises resources

Check endpoint and job health, then turn failed checks into incidents and status-page updates.

Check websites, endpoints, ports, DNS, and scheduled heartbeats, then send alerts when checks fail.

Probe HTTP, HTTPS, DNS, TCP, ICMP, and gRPC endpoints and expose results for Prometheus to scrape.