Incoming is a packet monitor designed to monitor SYN packets. Machines receive SYN packets when a remote machine is trying to initiate a TCP connection.

When a machine is listening on a port, it replies the machine sending the SYN packet with an aknowledgement ( ACK ) request. If the machine is not listening on a particular port, then the machine will reply with a reset ( RST ) request.

Many crackers use the SYN scan technique to detect open ports. This helps the crackers easily detect the services running on a machine.

Incoming is a utility designed to closely monitor the SYN packets being received by a machine. This can be of great help to machines that act as servers on the internet, or machines that are directly connected to the internet through a broadband connection.

Features:

1. Passive fingerprinting: Detect the operating system of remote machines
2. Find the country of remote machines
3. Map remote machines on a map, down to city level
4. Find details about the ISP which host the remote machine
5. Powerful and easy to use interface
6. Fully Unicode compliant
7. Available in multiple languages