In a worst case scenario, a piece of malicious code such as a Trojan Horse or a Downloader has infected your machine and is communicating via your Internet connection. Your computer could be a zombie machine in a botnet network, spamming immense quantities of emails and drastically impacting the performance of the operating system. Fortunately, both Windows Vista and Windows XP provide you with the means to monitor your Internet activity.

Netstat is a command line utility designed to allow you a closer view at “protocol statistics and current TCP/IP network connections. The netstat utility displays active TCP connections, ports on which the computer is listening, Ethernet statistics, the IP routing table, IPv4 statistics (for the IP, ICMP, TCP, and UDP protocols), and IPv6 statistics (for the IPv6, ICMPv6, TCP over IPv6, and UDP over IPv6 protocols).” (more…)

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