Online Port Scanner

Use this tool to scan individual ports to determine if the device is listening on that port.  Scanning TCP ports only (UDP scanning available soon by free registration).  Over 22,588,235 ports scanned for our guests.

Host name or IPv4 address:
Scan a single port number:
Scan a range of ports: (less than 500 ports please)	Beginning port number Ending port number
FTP/file server open/vulnerable (port 21) TELNET service open/vulnerable(port 23) SMPT relay vulnerable (port 25) POP3/mail server vulnerable (port 110) HTTP/web server vulnerable (port 80) Scan for Windows file sharing susceptibility (port 445) Scan for NETBIOS susceptibility (port 139) Scan for firewall remote login (port 8080) Microsoft Remote Desktop vulnerable (port 3389) VNC Remote Desktop vulnerable (port 5900) VPN (PPTP) service open/vulnerable (port 1723) Microsoft SQL Server open/vulnerable (port 1433) Oracle database service open/vulnerable (port 1521) MySQL database open/vulnerable (port 3306) Check All     Uncheck All
Terms of Use

A full list of port number assignments are maintained by T1 Shopper.

Ports are hardware locations for passing data in and out of a computing device.  Personal computers have various types of ports, including internal ports for connecting disk drives, monitors, and keyboards, as well as external ports, for connecting modems, printers, mouse devices, and other peripheral devices.  In TCP/IP and UDP networks, port is the name given to an endpoint of a logical connection.  Port numbers identify types of ports.  For example, both TCP and UDP use port 80 for transporting HTTP data from a web server.  Some viruses attack specific ports as part of their design such as SASSER virus that uses TCP port 445 and others.

To test if you might be vulnerable to the SASSER virus, use the above port scan tool to scan port 445.  If the portscan indicates that port 445 is open and active, then you may be susceptible to the SASSER virus.

Ports are used technically as described in RFC793

For a complete security virus or security scan T1 Shopper suggests visting the following tools:

• Symantec Security Check
• ShieldsUp!