Shields Up
Encyclopedia
Shields Up is an online port
scanning service created by Steve Gibson of Gibson Research Corporation and hosted at grc.com. The purpose of this utility is to alert the users of any ports that have been opened through their firewalls or through their NAT routers
. The utility can scan the most common file sharing
ports, as well as all service ports (1-1056), and user defined ports, in sets of 64.
The scanning servers have the static IP addresses of 4.79.142.192 to 4.79.142.207.
TCP and UDP port
In computer networking, a port is an application-specific or process-specific software construct serving as a communications endpoint in a computer's host operating system. A port is associated with an IP address of the host, as well as the type of protocol used for communication...
scanning service created by Steve Gibson of Gibson Research Corporation and hosted at grc.com. The purpose of this utility is to alert the users of any ports that have been opened through their firewalls or through their NAT routers
Network address translation
In computer networking, network address translation is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device....
. The utility can scan the most common file sharing
File sharing
File sharing is the practice of distributing or providing access to digitally stored information, such as computer programs, multimedia , documents, or electronic books. It may be implemented through a variety of ways...
ports, as well as all service ports (1-1056), and user defined ports, in sets of 64.
The scanning servers have the static IP addresses of 4.79.142.192 to 4.79.142.207.