We'll be pushing out a GameGuard update at 1:30pm PDT/3:30pm CDT/4:30pm EDT/8:30pm GMT to address the blocking of proxy servers when accessing Lineage II.
This will NOT require any server downtime.
It will be a client update, so you'll need to log out and update your client.
If you do not update your client, you may be kicked off the server after the update.
We'll update this thread once the GameGuard patch is live.