DNS Client with Proxy Protocol v2

This is a Go-based DNS client that supports Proxy Protocol v2, allowing you to send DNS queries while preserving client source IP information.

Features

✅ Sends DNS queries using UDP
✅ Supports Proxy Protocol v2 to include source IP details
✅ Allows setting Type-Length-Value (TLV) fields in the Proxy Protocol header
✅ Supports DNS query types: A, AAAA, MX

Installation

Make sure you have Go installed (>=1.18).

1. Clone the repository:

   git clone https://github.com/yourusername/dns-proxy-client.git
   cd dns-proxy-client

2. Install dependencies:

   go mod tidy

3. Build the binary:

   go build -o dns-client

Usage

Run the client with the following syntax:

./dns-client <dns_server> <port> <domain> <type(A,AAAA,MX)> [kv_key=kv_value]

Example to query an AAAA record with Proxy Protocol and a TLV field:

./dns-client 1.1.1.1 53 example.com AAAA 1=custom-data

Dependencies

• miekg/dns – DNS library for Go
• pires/go-proxyproto – Proxy Protocol implementation