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Reverse domain name notation (or reverse-DNS) is a naming convention for components, packages, types or file names used by a programming language, system or framework. Reverse-DNS strings are based on registered domain names, with the order of the components reversed for grouping purposes.
Nmap can provide further information on targets, including reverse DNS names, device types, and MAC addresses. [13] Typical uses of Nmap: Auditing the security of a device or firewall by identifying the network connections which can be made to, or through it. [14] Identifying open ports on a target host in preparation for auditing. [15]
The reverse DNS database of the Internet is rooted in the .arpa top-level domain. Although the informational RFC 1912 (Section 2.1) recommends that "every Internet-reachable host should have a name" and that "for every IP address, there should be a matching PTR record," it is not an Internet Standard requirement, and not all IP addresses have a ...
A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a * as the leftmost label (part) of a domain name, e.g. *.example.com. The exact rules for when a wildcard will match are specified in RFC 1034, but the rules are neither intuitive nor clearly ...
The domain name arpa is a top-level domain (TLD) in the Domain Name System (DNS) of the Internet. It is used predominantly for the management of technical network infrastructure. 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.
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]
Forward-confirmed reverse DNS (FCrDNS), also known as full-circle reverse DNS, double-reverse DNS, or iprev, is a networking parameter configuration in which a given IP address has both forward (name-to-address) and reverse (address-to-name) Domain Name System (DNS) entries that match each other. This is the standard configuration expected by ...
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