TCP Services Detection Scanner

This scanner identifies open TCP ports and collects service banners for analysis. It is commonly used by security teams, penetration testers, and network administrators to map active services running on a network. The tool operates by connecting to open ports, attempting to receive initial data from the service, and sending an HTTP GET request when necessary. It also supports basic telnet handshake to identify certain service types more accurately. This makes it a versatile tool for understanding the services exposed to external or internal network interfaces.

In terms of detection, the scanner looks for banners from services running on open TCP ports. It identifies the type of service and may provide basic version details based on the data retrieved. The scanner can be particularly effective in identifying unprotected services or misconfigured systems that reveal sensitive information via their banners. The detection process is non-intrusive and safe for general use.

The scanner works by connecting to open TCP ports and retrieving any available data. If no banner is received, it sends a standard HTTP GET request to elicit a response. For services implementing telnet, it engages in option negotiation to extract meaningful banners. This technical approach ensures compatibility with a wide variety of TCP-based services and maximizes the amount of information obtained during scans.

Exploitation of the information retrieved by this scanner could lead to targeted attacks, service disruptions, or unauthorized access. Misconfigured services exposing version details might allow attackers to exploit known vulnerabilities specific to those versions. Therefore, securing exposed services and minimizing the amount of information disclosed via banners are critical steps in reducing risk.

REFERENCES

• http://nmap.org/book/man-legal.html