resolve-ptr

SOCKS Proxy DNS Reverse Lookup Example

A simple CLI example demonstrating how to use socksgo to perform reverse DNS lookups (IP address → hostname) through a SOCKS proxy using Tor's SOCKS extension.

Usage

go run . [options]

Options

• -proxy: SOCKS proxy URL with ?tor option (default: socks5://127.0.0.1:1080?tor)
• -ip: IP address to reverse lookup (default: 8.8.8.8)
• -timeout: Operation timeout (default: 30s)

Examples

Basic Reverse Lookup

# Reverse lookup for Google's DNS server
go run . -proxy socks5://localhost:1080?tor -ip 8.8.8.8

# Reverse lookup for Cloudflare's DNS server
go run . -proxy socks5://localhost:1080?tor -ip 1.1.1.1

With Authentication

# Use SOCKS proxy with authentication
go run . -proxy socks5://user:pass@localhost:1080?tor -ip 8.8.8.8

Tor Proxy

# Reverse lookup through Tor daemon SOCKS proxy (default port 9050)
go run . -proxy socks5://localhost:9050?tor -ip 8.8.8.8

Notes

The ?tor URL option is required to enable Tor's SOCKS extension for DNS resolution. Without it, the LookupAddr method will return an error.

Not all IP addresses have reverse DNS records. Some addresses may return an empty list of hostnames.