doh is a command-line DNS client dedicated to DNS over HTTPS. Rather than sending conventional DNS queries directly to a resolver, it sends requests to DoH servers over HTTPS.
By default the program can query Google Public DNS, Cloudflare and Quad9. These services are queried concurrently, which makes it easy to compare the answers returned by several resolvers from a single command. You can also replace the defaults with your own DoH server URLs.
Multiple domain names can be queried in the same invocation and the queries themselves are performed concurrently. The DNS record type is configurable, allowing the client to retrieve records such as A, AAAA and MX.
Results are streamed to standard output as newline-delimited JSON objects. This makes doh particularly convenient for scripting and for use with utilities such as jq. Instead of presenting a heavily formatted interactive display, the program produces structured data that can be filtered, transformed or redirected to a file.
The client provides control over timeouts and the maximum number of retries made for each query. It also lets you specify the resolver used to look up the hostname of the DoH server itself, together with the network protocol used for that bootstrap lookup.
There is also an option to permit connections to DoH servers using certificates that cannot be verified, although that option naturally reduces the protection normally provided by HTTPS.
doh is a focused tool. It is especially useful when testing DoH endpoints, comparing resolver responses or incorporating encrypted DNS lookups into command-line workflows.
This is free and open source software.
Key Features
- Queries DNS records using DNS over HTTPS.
- Uses Google, Cloudflare and Quad9 as default resolvers.
- Supports custom DNS-over-HTTPS servers.
- Queries multiple resolvers and domains concurrently.
- Supports configurable DNS record types.
- Streams results as newline-delimited JSON.
- Provides configurable timeouts and retry limits.
- Allows control over bootstrap DNS resolution.
Website: github.com/picatz/doh
Support:
Developer: Kent Gruber
License: MIT License
doh is written in Go. Learn Go with our recommended free books and free tutorials.
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