Thanks for advices. They works fine. I am from Europe / Finland and using windows.
Target box in GW2.exe shortcut icon:
Earlier: “C:\Program Files (x86)\Guild Wars 2\Gw2.exe”
And after: “C:\Program Files (x86)\Guild Wars 2\Gw2.exe” -authsrv 206.127.146.73 -assetsrv 64.25.41.2