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The hosts file is one of several system facilities that assists in addressing network nodes in a computer network. It is a common part of an operating system's Internet Protocol (IP) implementation, and serves the function of translating human-friendly hostnames into numeric protocol addresses, called IP addresses, that identify and locate a host in an IP network.
PeerBlock is the Windows successor to the software PeerGuardian (which is currently maintained only for Linux). [3] It blocks incoming and outgoing connections to IP addresses that are included on blacklists (made available on the Internet), and to addresses specified by the user. [ 3 ]
You need much more than just an AV package now. Blocking hosts file entries are good ways to block these bad hosts. [6] To tame down impolite programs that do meaningless DNS queries every few seconds. The BadHosts hosts file for Windows at hostsfile.org has some for the ZoneAlarm hosts associated with the ZoneAlarm Firewall commented out.
IP address blocking can be implemented with a hosts file (e.g., for Mac, Windows, Android, or OS X) or with a TCP wrapper (for Unix-like operating systems). It can be bypassed using methods such as proxy servers; however, this can be circumvented with DHCP lease renewal.
This configuration, for historical reasons, is stored in a flat text file that by default contains very few hostnames and their associated IP addresses. Editing this hosts file is simple and effective because most DNS clients will read the local hosts file before querying a remote DNS server.
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Domain Name System blocking, or DNS blocking / filtering, is a strategy for making it difficult for users to locate specific domains or websites on the Internet. It was first introduced in 1997 as a means to block spam email from known malicious IP addresses. [1] DNS blocking can also be applied for outgoing requests as well.
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