How to resolve IP address by it's domain? net.LookupIP function is incorrect.

[ghost]

What version of Go are you using (go version)?

$ go version
go1.13.8 linux/amd64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/entrl/.cache/go-build"
GOENV="/home/entrl/.config/go/env"
GOEXE=""
GOFLAGS=" -mod="
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GONOPROXY="github.com/entrl/*"
GONOSUMDB="github.com/entrl/*"
GOOS="linux"
GOPATH="/home/entrl/go"
GOPRIVATE="github.com/entrl/*"
GOPROXY="direct"
GOROOT="/snap/go/5364"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/snap/go/5364/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/entrl/Desktop/go-code/dns-resolver/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build407494331=/tmp/go-build -gno-record-gcc-switches"

What did you do?

https://play.golang.org/p/__ErkGGpo4p

I'm trying to resolve IP address by host name. But unfortunately all sites which are hosted on CloudFlare returns 1.1.1.1
That is because Go sets IP address to Host Header instead of variable I passed to LookupIP function.

What did you expect to see?

I expect to see real IP address for domain

What did you see instead?

I see 1.1.1.1 in response

[seankhliao]

For questions please see https://github.com/golang/go/wiki/Questions

1.1.1.1 is the correct response, if you try to make an HTTP request you will get a 301 redirect to www.udemy.com, which will return a "real" address

[ghost]

Got it, thank you.