Free port scanner

Blue's Port Scanner

A PortScanner is a program for tcp/ip based networks like the internet or the wide/local area network(W/LAN). It tests a host for running services like ftp, telnet or even backdoors. It's similar to somebody who goes over a parking and touches every doorknob to test if the door is open. The ports are the doors of the cars. Some of the ports are mostly uses for special services like the port #21 which is normaly reserved for ftp services.

This PortScanner for Windows95/98/ME/NT/2k/XP supports the TCP and UDP protocol. It can scan a single host or a range of ip-addresses. Either you define a range of ports(e.g. 1-5000) or you can create a list of ports to scan. Thereto you have to check the "Scan ports from list" checkbox.

If you enter an IP like "156.233.56.22:555" the 555 will be automatically cut off and passed into the start or end port text field.

To edit/load/save/create a list, click on the "Show list" botton.

The "Anti-Flood" function protects the scanner from being flooded ifthe host is sending much data on an open port to any client. It limits its answer message to 145 bytes.

The "Ping check" should be only deactivated if the host is not reachable, when you just know that it is alive in truth. If you deactivate this function, the "Auto pipeline control" function will be also deactivated and this will decrease the scan speed!! Burst mode is only useful for short scans(5000ports) on fast computers, because it can cause false reports especially when doing and UDP scan.

By clicking on the "?" symbol you can open the port list. With right-clicking on it you can select one of the three different search fuctions. You can also open the list by double-clicking on the start or end port text field. If you than double-click on a port of opened list this port will be writen down in the port field you have double- clicked at first.

You can open the history list of successful scanned hosts by double-clicking on the IP/Domain/Name fields. The history lists also offers a popup menu in which you can delete entries, load a new list or save the current.

At least I want to give you the hint to check all text fields for a context menu, because most of the functions are only attainable over a popup menu!

Download Blue's Port Scanner

Publisher - Volker Voss