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2. DNS blocking - Wikipedia

   en.wikipedia.org/wiki/DNS_blocking

   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.

3. Domain Name System blocklist - Wikipedia

   en.wikipedia.org/wiki/Domain_Name_System_blocklist

   A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist (DNSBL) or real-time blackhole list (RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [1]

4. Blacklist (computing) - Wikipedia

   en.wikipedia.org/wiki/Blacklist_(computing)

   Screenshot of a website blocking the creation of content which matches a regular expression term on its blacklist. In computing, a blacklist, disallowlist, blocklist, or denylist is a basic access control mechanism that allows through all elements (email addresses, users, passwords, URLs, IP addresses, domain names, file hashes, etc.), except those explicitly mentioned.

5. Operation In Our Sites - Wikipedia

   en.wikipedia.org/wiki/Operation_In_Our_Sites

   After the seizure the domain name registry alters registered information about the domain name, including the IP address on its domain name server (DNS), as property of the U.S. government. When a user intends to access the website from a domain that has been seized, DNS servers reply with the government server's IP address.

6. List of Internet top-level domains - Wikipedia

   en.wikipedia.org/wiki/List_of_Internet_top-level...

   This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet. A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [ 1 ]

7. Wikipedia:Spam blacklist - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Spam_blacklist

   If you have given appropriate warnings to a spammer, you should report them on Wikipedia:Administrator intervention against vandalism, where they can be blocked by an administrator. Open proxies used to spam should be reported to Wikipedia:Administrator intervention against vandalism or Wikipedia:WikiProject Open proxies so that they can be ...