Tweaking airtel ADSL Modem (Beetel 220BX ADSL2+)

I wanted my computer behind the beetel 220BX adsl modem (Provided by Airtel) to be visible for outside world. Basically for hosting a counter strike server and for webserver. I searched all the config details in the webUI given by the 220BX, but I was not able to spot a setting with which I can do a port forwarding or NAT. Then i started searching the net with google. The first search query ("beetel 220BX virtual server configuration") I entered returned me the url "http://blogs.broadbandforum.in/airtel/?p=9" in the first row. I should be more than lucky, the page says how to access the hidden page in the router, the "main.html" which gives a lot more advanced configuration options and I found exactly what I was looking for. So I am happy, the blogger should be happy as he was able to help yet another needful soul.

~Happy Ending~