Host File Manager

Host File Manager allows you to modify the HOSTS file on Windows operating system. A web browser checks the hosts file before it goes out to the Internet to look up the IP address of a URL using your ISP's DNS server.

This file is useful in blocking malicious addresses and advertisement servers. It is also good for internal routing if you do not have a DNS server, but still would like to resolve names to other machines that do not use NetBIOS.