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to protect a computer or network from unauthorized access
Implement firewall hardware as well as firewall software on your computer/computer network and implement the use of Access Control Lists (ACLs) on your network's routers.
A personal network filter used to restrict access to particular Internet resources from a local computer.
The firewall controls what programs can access the internet and what programs from the internet can access the computer what is a firewall ?How does it work? http://computer.howstuffworks.com/computer-internet-security-channel.htm Is a security program which protects your computer from unauthorized access through the Internet. It resides on your PC and filters traffic coming and going from your computer http://www.Microsoft.com/protect/computer/firewall/faq.mspx
You can use its IP address or network name (your firewall has to be configured properly).
That sounds like a firewall.
The firewall that only allows packets of registered connection is called packet filter. It is also the central piece in firewalling.
Firewall provides a way of controlling network access to a computer. However, using firewall may degrade the performance of the system. It is also difficult to configure and maintain the firewall.
Windows Firewall
firewall
Firewall
RBACL stands for a role-based access control list. It is a way to restrict access to a system or computer network to authorized users only. You can assign users specific roles using RBACL.