Open up command prompt (type "cmd" in start menu) and in the black window that pops up type the following 2 commands and show the results of each one:
[CODE]nslookup mabinogi.nexon.net[/CODE]
And
[CODE]nslookup mabinogi.nexon.net 8.8.8.8[/CODE]
you should see something like this, just post whatever you get.
[Image: https://404.sh/i/LrbNW.png]