A flaw in Windows Firewall may prevent users from seeing all the open network ports on a Windows XP or Windows Server 2003 computer. The flaw manifests itself in the way the security application ...

Though Firewalls are necessary when your computer is connected to the Internet, they can cause problems trying to get Internet aware programs working properly. For example, if you wanted to host a ...

Fred Stluka from Bristle.com just introduced me to port knocking — a method of opening ports on a firewall by trying to connect with a series of ports in a pre-determined order. The sequence of ...

A Port basically serves as an interface between your computer and the internet or other computers in the network. Every communication over the web is exchanged using these ports, so they are an ...

Your computer's firewall is a network security protocol that blocks unauthorized access from a local network or the Internet. The firewall allocates "ports" to programs that require network and ...

Port Scanning applications like Free Port Scanner help you identify open ports and services on a network host. They thoroughly scan specific ports for a given IP and reveal vulnerable access points, ...

I have a VM running Server 2008 R2 SP1 that is a network print server - TCP/IP print queues are installed on the server, and then shared out/published in AD. Client PC's connect to the shared printers ...

Windows XP comes with a built-in firewall called Windows Firewall. For people who do not want to spend the money on a commercial software firewall, this firewall will be more than enough to protect ...

If you're looking for a way to discover which ports are standing wide open on network machines, read about a powerful cross-platform solution that will do the trick. Editor’s note on June 4, 2015: ...

Nearly everyone uses FTP for one reason or another. The problem is, FTP is a messy protocol that needs a lot of help to secure it. Let Thomas Shinder enlighten you. The File Transfer Protocol (FTP) is ...