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  2. Blackhole server - Wikipedia

    en.wikipedia.org/wiki/Blackhole_server

    The AS112 project is a group of volunteer name server operators joined in an autonomous system. They run anycasted instances of the name servers that answer reverse DNS lookups for private network and link-local addresses sent to the public Internet. These queries are ambiguous by their nature, and cannot be answered correctly.

  3. Reverse DNS lookup - Wikipedia

    en.wikipedia.org/wiki/Reverse_DNS_lookup

    In computer networks, a reverse DNS lookup or reverse DNS resolution (rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. [1]

  4. .arpa - Wikipedia

    en.wikipedia.org/wiki/.arpa

    Prominent among such functions are the subdomains in-addr.arpa and ip6.arpa, which provide namespaces for reverse DNS lookup of IPv4 and IPv6 addresses, respectively. The name originally was the acronym for the Advanced Research Projects Agency (ARPA), the funding organization in the United States that developed the ARPANET , the precursor of ...

  5. 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

  6. djbdns - Wikipedia

    en.wikipedia.org/wiki/Djbdns

    dnscache — the DNS resolver and cache. tinydns — a database-driven DNS server. walldns — a "reverse DNS wall", providing IP address-to-domain name lookup only. rbldns — a server designed for DNS blacklisting service. pickdns — a database-driven server that chooses from matching records depending on the requestor's location.

  7. MaraDNS - Wikipedia

    en.wikipedia.org/wiki/MaraDNS

    MaraDNS runs as an unprivileged user inside of a chroot environment, while MaraDNS specifies the user and group to run as by user-ID, Simon Burnet has made a patch that makes it possible to supply a username [7] MaraDNS can add both IP records and the corresponding PTR "reverse DNS lookup" record. [8]

  8. Reverse proxy - Wikipedia

    en.wikipedia.org/wiki/Reverse_proxy

    Reverse proxy servers are implemented in popular open-source web servers. Dedicated reverse proxy servers are used by some of the biggest websites on the Internet. A reverse proxy is capable of tracking all IP addresses requests that are relayed through it as well as reading and/or modifying any non-encrypted traffic. However, this implicitly ...

  9. Forward-confirmed reverse DNS - Wikipedia

    en.wikipedia.org/wiki/Forward-confirmed_reverse_DNS

    That is, the reverse DNS might verify, but it will usually be part of another domain than the claimed domain name. Using an ISP's mail server as a relay may solve the reverse DNS problem, because the requirement is the forward and reverse lookup for the sending relay have to match, it does not have to be related to the from-field or sending ...