Always use SourceIP for host target filtering (#8649)

cmd/bucket-notification-handlers.go

@@ -31,6 +31,7 @@ import (
 	xhttp "github.com/minio/minio/cmd/http"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/event"
+	"github.com/minio/minio/pkg/handlers"
 	xnet "github.com/minio/minio/pkg/net"
 	"github.com/minio/minio/pkg/policy"
 )
@@ -278,7 +279,7 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 		return
 	}
 
-	host, err := xnet.ParseHost(r.RemoteAddr)
+	host, err := xnet.ParseHost(handlers.GetSourceIP(r))
 	if err != nil {
 		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
 		return