TCP/IP Analyzer IP Address: 125.162.29.249 () Client OS: Windows 7 Browser: Chrome 58.0.3029.33 User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.33 Safari/537.36 Please Read the Analyzer FAQ if the above is not your IP address . TCP options string = 020405ac0103030201010402 MTU = 1492 MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput. MSS = 1452 MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value. Default TCP Receive Window (RWIN) = 17424 RWIN Scaling (RFC1323) = 2 bits (scale factor: 2^2=4) Unscaled TCP Receive Window = 4356 In Windows 7, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the latest TCP Optimizer for tweaking. You seem to be using Google Chrome. Note that Chrome can modify the TCP Window for sockets it creates under some OSes, and therefore servers may not