Created
May 31, 2025 16:12
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IPv6 Golang bypass
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| package main | |
| import ( | |
| "log" | |
| "net" | |
| "net/url" | |
| ) | |
| func main() { | |
| input := "http%3A%2F%2F::ffff:a9fe:a9fe:0443" | |
| // Parse the URL | |
| decodedURL, err := url.QueryUnescape(input) | |
| if err != nil { | |
| log.Fatalf("Failed to decode URL: %v", err) | |
| } | |
| log.Println("Decoded URL:", decodedURL) | |
| parsedURL, err := url.Parse(decodedURL) | |
| if err != nil { | |
| log.Fatalf("Failed to parse URL: %v", err) | |
| } | |
| log.Println("Parsed URL:", parsedURL) | |
| // Resolve DNS | |
| ips, err := net.LookupIP(parsedURL.Host) | |
| if err != nil { | |
| log.Fatalf("DNS lookup failed: %v", err) | |
| } | |
| // Check first resolved IP | |
| if len(ips) > 0 { | |
| ip := ips[0] | |
| log.Printf("Resolved IP: %v\n", ip) | |
| // Check if private | |
| if ip.IsPrivate() { | |
| log.Println("IP is private") | |
| } else { | |
| log.Println("IP is public") | |
| } | |
| } else { | |
| log.Println("No IPs resolved") | |
| } | |
| } |
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Related issue golang/go#31024