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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 ...
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. (This feature is now a standard part of tinydns ...
Namebench is an open-source Domain Name System (DNS) benchmark utility by Google, Inc, [1] which is licensed under the Apache License, version 2.0. [2] Namebench runs on Windows, OS X, and Unix. [1] It is available with a graphical user interface as well as a command-line interface. [1] Its purpose is to find the fastest DNS server one could ...
Additionally, the answer returned is also allowed to be cached by recursive DNS servers. This is especially helpful because a second lookup for the same address performed by the same node would probably be answered from the local cache instead of querying the authoritative servers again. This helps reduce the network load significantly.
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]
Using a firewall to disable DNS on whole device (usually outgoing connections UDP and less commonly TCP port 53), or setting DNS servers to non-existing ones like local 127.0.0.1 or 0.0.0.0 (via command line or 3rd party app if not possible via OS GUI interface). This requires alternate ways of resolving domains like the above-mentioned ones ...
OpenDNS is an American company providing Domain Name System (DNS) resolution services—with features such as phishing protection, optional content filtering, and DNS lookup in its DNS servers—and a cloud computing security product suite, Umbrella, designed to protect enterprise customers from malware, botnets, phishing, and targeted online attacks.
dnsmasq caches DNS records, reducing the load on upstream nameservers and improving performance, and can be configured to automatically pick up the addresses of its upstream servers. dnsmasq accepts DNS queries and either answers them from a small, local cache or forwards them to a real, recursive DNS server. It loads the contents of /etc/hosts ...