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Consumer-grade internet routers can sometimes obtain a new public IP address on-demand from the ISP using DHCP lease renewal to circumvent individual IP address blocks. This, however, can be countered by blocking the range of IP addresses from which the internet service provider is assigning new IP addresses, which is usually a shared IP ...
Lately [when?] network-based parental control devices have emerged. These devices working as a firewall router use packet filtering, DNS response policy zone (RPZ) and deep packet inspection (DPI) methods to block inappropriate web content. These methods have been used in commercial and governmental communication networks.
Announcements of new assignments are often published on network operators' mailing lists (such as NANOG) to ensure that bogon filtering can be removed for addresses that have become legitimate. For example, addresses in 49.0.0.0 / 8 were not allocated prior to August 2010, but are now used by APNIC .
Companies that make products that selectively block Web sites do not refer to these products as censorware, and prefer terms such as "Internet filter" or "URL Filter"; in the specialized case of software specifically designed to allow parents to monitor and restrict the access of their children, "parental control software" is also used.
Instead of returning the valid IP address of a requested site (for example, instead of 198.35.26.96 being returned by the DNS when "www.wikipedia.org" is entered into a browser, [2] if this IP were on a block list, the DNS might reply that the domain is unknown or with a different IP address that directs to a site with a page stating that the ...
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Psiphon is a centrally managed and geographically diverse network of thousands of proxy servers, using a performance-oriented, single- and multi-hop routing architecture. [ 1 ] Psiphon is specifically designed to support users in countries considered to be "enemies of the Internet". [ 2 ]
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