Port Forward

Messages
1
Location
Mumbai
ISP
MTNL
Hi all,
I've been using FTTH in Thane for 6 months and I am quite satisfied with. However earlier I was on hathway and used to host a counter strike gaming server for my friends. After FTTH I am unable to open ports.
This is my network diagram-
ONT----------ROUTER--------COMPUTER
(AONT-100c) (Cisco E1000) (Acer Aspire 47220z)
I want to host a Counter Strike 1.6 Server.
I earlier followed this to port forward on hathway and it worked perfectly. But on MTNL it does not work, my friends are not able to connect.
I have set the default gateway for the ONT as 192.168.0.251 and for the router as 192.168.1.1
Can someone guide me on how to port forward.
Thanking you,
dark_shadow
THE QUIETER YOU ARE THE MORE YOU ARE ABLE TO HEAR