Question 1

dns-packet vs Node.js dns module: which one should I use?

Accepted Answer

Use dns-packet for low-level control over DNS packet formats and custom protocols like DoH/DoT; Node.js's dns module is better for simple, high-level resolution with system integration but less flexibility. dns-packet is ideal when you need to manipulate raw packets or implement non-standard DNS features.

Question 2

How to build a DNS over HTTPS client with dns-packet?

Accepted Answer

Follow the provided DoH example to encode DNS packets with dns-packet, then use an HTTP client like fetch or axios to send them as HTTPS requests. You'll need to handle HTTP headers and error handling separately, as dns-packet only deals with the DNS payload encoding/decoding.

Question 3

Does dns-packet work in the browser or only Node.js?

Accepted Answer

It's designed for Node.js and relies on core modules like dgram and net for UDP/TCP, so it won't run in browsers without significant adaptation or a build tool like Browserify. For browser DNS, consider libraries built for Web APIs.

Question 4

What EDNS0 options does dns-packet support?

Accepted Answer

It supports enhanced EDNS0 options like CLIENT_SUBNET, TCP_KEEPALIVE, PADDING, and KEY_TAG with dedicated encoding/decoding, as detailed in the README. For generic options, you can pass custom code and data buffers.

Question 5

How to handle DNSSEC records with dns-packet?

Accepted Answer

dns-packet includes support for DNSSEC records such as DNSKEY, DS, and RRSIG, allowing you to encode and decode secure DNS responses. You'll need to implement signature validation and key management externally.

Question 6

Is dns-packet good for building a multicast DNS server?

Accepted Answer

Yes, it was originally lifted from multicast-dns and is well-suited for multicast DNS applications due to its efficient packet handling and support for relevant record types. However, you'll need to add multicast networking logic on top.

dns-packet

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