Remote Desktop is one of the most popular method to access to the microsoft windows server which locate as Co-location in the Internet Data Center. But there is still a security problem because a password can be hacked by Trojan infected PC or password can be sniffed via network or even taking a random for password from Password Generator program. This paper presents the completed security protection even the password has been hacked or stolen the hacker can not access to the server via the remote desktop. Normally the port 3389 of Remote Desktop will be closed thus any computer from the internet cannot be accessed. To get access permission it must be done with special requisition with the other password which access through the port 80 (port of web server) that is always generally opened. Only single IP address can get the permission at the time. This method of protection was never published anywhere yet. Result of using this method in the most popular mobile web in Thailand for more than 2 years there is no one can hack into the system at all.

Currently the internet services with 3G technology by mobile phone operators in Thailand are different in the performance. The mobile phone operators have already launched 3G technology with 2G frequency ranges which are limited in the efficiency. This paper aims to compare the efficiency of the internet service with 3G technology by three mobile phone operators (AIS DTAC and Truemove H) in Thailand. There are three type of testing as follows: Ping to both domestic and international website Bandwidth speed test and FTP Test (upload and download) are used to evaluate the performance of these mobile phone operators. There were five places in Bangkok where are the top of the network congestion list for such testing the three mobile phone operators. The result showed that AIS gives the best performance in the ping test. Truemove H introduces the best performance in both FTP and Bandwidth speed test. The DTAC performances are moderated level for every tests.