Just to make things easier on people if you are having connection issues please use the tool below. Its made by me for L2Shrine (it will not work for any other L2 servers).
The tool is a executable and once run it will ping and trace the main server and the three proxies. You don't have to do anything but wait for the program to finish running and send the results to the GM team / create a post in the forum.
L2Shrine_Ping - This will ping the main server and then three proxies 10 times each and populate the results.
L2Shrine_Trace - This will trace the main server and the three