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For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google. If the A record for dns.google in turn pointed back to 8.8.4.4 then it would be said to be forward-confirmed .
Used to provide status information about a zone. Requested for the IETF draft "The Zone Status (ZS) DNS Resource Record" in 2008. Expired without adoption. [21] RKEY 57 — Used for encryption of NAPTR records. Requested for the IETF draft "The RKEY DNS Resource Record" in 2008. Expired without adoption. [22] TALINK 58 —
A DNS name server is a server that stores the DNS records for a domain; a DNS name server responds with answers to queries against its database. The most common types of records stored in the DNS database are for start of authority ( SOA ), IP addresses ( A and AAAA ), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS ...
MaraDNS is a free software DNS server by Sam Trenholme that claims a good security history and ease of use. [9] [10] In order to change any DNS records, MaraDNS needs to be restarted. Like djbdns dnscache, the MaraDNS 2.0 stand-alone recursive resolver ("Deadwood") does not use threads.
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 ...
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
A Canonical Name (CNAME) record is a type of resource record in the Domain Name System (DNS) that maps one domain name (an alias) to another (the canonical name). [ 1 ] This can prove convenient when running multiple services (like an FTP server and a web server , each running on different ports) from a single IP address .
The number 172719 in the above example is the time to live value, which indicates the time of validity of the data. The any DNS query is a special meta query which is now deprecated. Since around 2019 , most public DNS servers have stopped answering most DNS ANY queries usefully [1] .