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Web filtering in schools blocks students from inappropriate and distracting content across the web, while allowing sites that are selected by school administrators. [1] Rather than simply blocking off large portions of the Internet, many schools utilize customizable web filtering systems that provide them with greater control over which sites are allowed and which are blocked.
VPN blocking is a technique used to block the encrypted protocol tunneling communications methods used by virtual private network (VPN) systems. Often used by large organizations such as national governments or corporations, it can act as a tool for computer security or Internet censorship by preventing the use of VPNs to bypass network ...
Unix-like operating systems commonly implement IP address blocking using a TCP wrapper, configured by host access control files /etc/hosts.deny and /etc/hosts.allow.. Both companies and schools offering remote user access use Linux programs such as DenyHosts or Fail2ban for protection from unauthorized access while allowing permitted remote access.
Virtual private network (VPN): Using a VPN, a user who experiences internet censorship can create a secure connection to a more permissive country, and browse the internet as if they were situated in that country. [1] Some services are offered for a monthly fee; others are ad-supported.
A forward proxy is a server that routes traffic between clients and another system, which is in most occasions external to the network. This means it can regulate traffic according to preset policies, convert and mask client IP addresses, enforce security protocols and block unknown traffic.
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