Hey im back as you see. And brought out some unusual questions with me. Please take care of these. As everyone, i am a client who is connected to Internet and mostly web servers. Nevertheless, i am curious about someting named privacy. Can we really become invisible on the Internet somehow? 2- While implementing NAT, we match private IP addresses with public ones. But, on this occasion, can't we protect our inside network from the outside? I could think like that until i heard web servers record information of all computers linked to it. If they save all things about us, NAT is not able to protect us that time. 3- Imagine same thing for proxies. As far as i know, proxy servers behave an intermediate device among our computer and web servers that use their IP addresses and make visible to web servers. However, same problem appears here too. (web servers keep logs about us) 4- This time forget about NAT,proxies. Everytime we connect to web servers by transmitting IP packets. In these packets there is IP header which bears control and address information. So that, even without applying NAT or proxies, can't we reveal ourselves with the information in IP packets?