The DNS server at 75.75.75.75:53 told your program that it did not have a record for example.com.

Why do you think this is a problem with Go?

I changed a real hostname for security reasons.
If I compile with CGO_ENABLED=1 it works just fine, so yes it’s a go issue.

I can't reproduce this problem using this program:

package main

import (
	"log"
	"net"
)

func main() {
	_, err := net.Dial("tcp", "www.google.com:80")
	if err != nil {
		log.Fatal(err)
	}
}

It succeeds with and without CGO_ENABLED=0. Do other host names resolve? Is the problem specific to 75.75.75.75?

We use akamai EAA client, that's when the error occurs. Only CGO_ENABLED=1 fixes this issue.

It sounds like this specific client injects itself NSS, which requires your go binary to use the system libc name resolver. When cgo is disabled the system libc name resolver cannot be used as that requires cgo.

Does this answer your question?

Closing old issues that still have the WaitingForInfo label where enough details to investigate weren't provided. Feel free to leave a comment with more details and we can reopen.