In a “half-open” SYN scan, the three-way handshake is never completed—the port scanner judges whether the port is open by the response given by the target machine. Now that we've covered the basic ...

If you're looking for a best-in-breed port scanner to be used on the Android platform, PortDroid might be what you need. Get the lowdown on this free Android app.

Advanced Port Scanner scans for open ports on network computers and other devices, and it shows any version information it finds for programs running on detected ports.

Developer: Shipwreck Software Network Port Scanner Network Port Scanner is a standard port scanner for checking your network for any ports that are open and revealing the IP addresses they are ...

MiTeC Network Scanner is a free multi-threaded ICMP, Port, IP, NetBIOS, ActiveDirectory and SNMP scanner with advanced features. The program performs ping sweep, scans for opened TCP and UDP ports ...

SoftPerfect Network Scanner can also check for a user-defined port and report back if one is open. It can also resolve host names and auto-detect your local and external IP range.

A scan can improve the security of your network, but be sure you know the law before you decide to do so.

SoftPerfect Network Scanner can also check for a user-defined port and report back if one is open. It can also resolve host names and auto-detect your local and external IP range.

A scan can improve the security of your network, but be sure you know the law before you decide to do so.