IP address blocking - Definition from the Hotspot Shield Glossary
The process of IP Address Blocking is where a network administrator for example will create a rule that blocks a certain IP address or group of IP addresses from accessing a network or particular server.
IP address blocking is an effective way to prevent undesired access to a business’s private network, and also to stop such destructive attacks as the Brute Force Attack. If a user is being disruptive, or is attempting to gain access to a restricted area, a network administrator can find their IP address and then add it to a list of blocked addresses - The next time the user attempts to access the network or website again, they will receive a message that they are denied access. Proxy servers and VPN tunnels can be used to bypass IP Address bans.