yes. I am having that. so what is the solution to that?
I would talk to Singtel it looks like a routing issue, which is why I get past 188.8.131.52 fine but you do not.
For CS this could also occur within Alter.net and this 184.108.40.206 router or this 220.127.116.11 router does not know how to route the packets correctly back to the singtel network.