I am suffering from the hacking problem of my Internet TCP/IP A/c. One week ago I renewed my A/c and now while checking I found that 50% of the total 500 hrs is already used. I am totaly confused. I am using it from Calcutta, India and my ISP is VSNL. Please help to give some light on it and how I can protect my A/c. What precautionery measures and configuration settings I should take to prevent those hackers. Otherwise I will have to withdraw the A/c and will have to use some rented facility like NIIT Computerdrome. Please help me in this regard.