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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 ...
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.
California regulations say IP addresses need to be treated as personal information if the business itself, not a third party, can link them to name and street address. [179] [180] In 2020, An Alberta court ruled that police can obtain the IP addresses and the names and addresses associated with them, without a search warrant. An investigation ...
Some methods, such as the use of alternate DNS servers, use false addresses or address lookup systems to evade less sophisticated blocking tools while the user accesses the site. [1] [2] The drawback of this method is that many censors block the IP address of restricted domains in addition to the DNS, rendering the bypass ineffective. Other ...
Most IP addresses should not be blocked more than a few hours, since the malicious user will probably move on by the time the block expires. If there is persistent disruption or vandalism from an IP address, the block should be extended (with the 'anon-only' option selected) as long as is necessary to prevent further disruption.
IP hijacking is sometimes used by malicious users to obtain IP addresses for use in spamming or a distributed denial-of-service (DDoS) attack. When a router promulgates flawed BGP routing information, whether that action is intentional or accidental, it is defined by the Internet Engineering Task Force (IETF) in RFC 7908 as a "route leak".
DNS hijacking, DNS poisoning, or DNS redirection is the practice of subverting the resolution of Domain Name System (DNS) queries. [1] This can be achieved by malware that overrides a computer's TCP/IP configuration to point at a rogue DNS server under the control of an attacker, or through modifying the behaviour of a trusted DNS server so that it does not comply with internet standards.
Similarly, a service can prohibit access by blocking access from IP addresses and IP address ranges that are known to belong to VPN providers. [1] [2] Some governments have been known to block all access to overseas IP addresses, since VPN use can involve connecting to remote hosts that do not operate under that government's jurisdiction. [3]