I was working while DNS hosting of my provider was closed. Provider o3.ua. All IP's are pinging except for provider's DNS ip. By sheer luck my irssi client didn't loose connection, I switched to ##linux and asked. They said to change /etc/resolv.conf. (nameserver 8.8.88)
Though I need temporarily server, they don't know how to not to write to file my domain hosting. I'm working and could forget and parameters and totally about it, so I need a temporary solution. And if it is possible a quick dispatch to return and use my original /etc/resolf.conv