[Rehan]

@deanhills Thanks for your support.As our sponsor said that it maybe be a problem in game server, i don't think a game server require specific OS.In this giveaway when i won the VPS 9 i hosted the same server scripts on Ubuntu and Debian without any problem.In last month i had a VPS with Centos and server was working well.It means that this is not problem in gaming server scripts.
I have noticed another thing, during some intervals of time server is visible to some players.Look i am still unable to reach the server from 3 different locations while today when i restored the screen ( server terminal ).Its logs is showing that a player connected to the server.It means it is visible sometime to some specific IP's. I don't know what is the problem.
@Melvin can you please tell us which Game Server are you trying to host?

EDIT: It is visible to me right now.I have asked my friends to check if the server is visible to them from 4 different countries location.Server is not visible to them.I have asked a Indian, Russian, Pakistani and Bangali friend at the same time when server is visible to me.