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  2. ISP redirect page - Wikipedia

    en.wikipedia.org/wiki/ISP_redirect_page

    Every ISP runs a DNS server to allow their customers to translate domain names into IP addresses that computers understand and use. When an ISP's DNS server receives a request to translate a name, according to RFC the DNS server should return the associated IP address to the customer's computer which is then able to connect to the requested ...

  3. Domain Name System blocklist - Wikipedia

    en.wikipedia.org/wiki/Domain_Name_System_blocklist

    When a mail server receives a connection from a client, and wishes to check that client against a DNSBL (let's say, dnsbl.example.net), it does more or less the following: Take the client's IP address—say, 192.168.42.23—and reverse the order of octets, yielding 23.42.168.192. Append the DNSBL's domain name: 23.42.168.192.dnsbl.example.net.

  4. Comparison of DNS server software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_DNS_server...

    Knot DNS is a free software authoritative DNS server by CZ.NIC. Knot DNS aims to be a fast, resilient DNS server usable for infrastructure (root and TLD) and DNS hosting services. Knot DNS supports DNSSEC signing and among others hosts root zone (B, K, and L root name servers ), several top-level domains .

  5. DNS blocking - Wikipedia

    en.wikipedia.org/wiki/DNS_blocking

    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 ...

  6. Blackhole server - Wikipedia

    en.wikipedia.org/wiki/Blackhole_server

    Reverse DNS queries are used to map IP addresses to domain names. They are PTR queries for subdomains of in-addr.arpa (for IPv4 addresses) [ 3 ] and ip6.arpa (for IPv6 addresses). [ 4 ] For example, to find the domain name associated with the IP address 203.0.113.22, one would send a PTR query for 22.133.0.203.in-addr.arpa .

  7. Unbound (DNS server) - Wikipedia

    en.wikipedia.org/wiki/Unbound_(DNS_server)

    Unbound is a validating, recursive, and caching DNS resolver product from NLnet Labs. It is distributed free of charge in open-source form under the BSD license . Features

  8. 1.1.1.1 - Wikipedia

    en.wikipedia.org/wiki/1.1.1.1

    1.1.1.1 is a free Domain Name System (DNS) service by the American company Cloudflare in partnership with APNIC. [7] [needs update] The service functions as a recursive name server, providing domain name resolution for any host on the Internet.

  9. nslookup - Wikipedia

    en.wikipedia.org/wiki/Nslookup

    nslookup is a member of the BIND name server software. Andrew Cherenson created nslookup as a class project at UC Berkeley in 1986 and it first shipped in 4.3-Tahoe BSD [1] In the development of BIND 9, the Internet Systems Consortium planned to deprecate nslookup in favor of host and dig.