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Pdnsd
pdnsd is a caching DNS proxy server created originally by Thomas Moestl and currently maintained by Paul Rombouts. pdnsd is configurable by a config file or using the program ''pdns-ctl'' that comes with the package. Unlike BIND, pdnsd stores cached DNS records on disk for long term retention and will not purge the cache upon program startup or shutdown. pdnsd is designed to be highly adaptable to situations where net connectivity is slow, unreliable, unavailable, or highly dynamic, as is the case with Wi-Fi hotspots or dialup internet. This program also has limited capability of acting as an authoritative nameserver for a local DNS zone within a private network. The program is released under the GNU General Public License (GPL). See also * Comparison of DNS server software This article presents a comparison of the features, platform support, and packaging of many independent implementations of Domain Name System (DNS) name server software. Servers compared Eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of DNS Server Software
This article presents a comparison of the features, platform support, and packaging of many independent implementations of Domain Name System (DNS) name server software. Servers compared Each of these Domain Name System, DNS servers is an independent implementation of the DNS protocols, capable of resolving DNS names for other computers, publishing the DNS names of computers, or both. Excluded from consideration are single-feature DNS tools (such as proxies, filters, and firewalls) and redistributions of servers listed here (many products repackage BIND, for instance, with proprietary user interfaces). DNS servers are grouped into several categories of specialization of servicing domain name system queries. The two principal roles, which may be implemented either uniquely or combined in a given product are: * Authoritative server: authoritative name servers publish DNS mappings for domains under their ''authoritative'' control. Typically, a company (e.g. "Acme Example Widgets" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PowerDNS
PowerDNS is a Name server, DNS server program, written in C++ and licensed under the GNU General Public License, GPL. It runs on most Unix derivatives. PowerDNS features a large number of different ''backends'' ranging from simple BIND style zonefiles to relational databases and Load balancing (computing), load balancing/failover algorithms. A DNS Domain Name System#DNS resolvers, recursor is provided as a separate program. History PowerDNS development began in 1999 and was originally a commercial proprietary product. In November 2002, the source code was made public under the open-source GPL v2 license. Features PowerDNS Name server#Authoritative name server, Authoritative Server (pdns_server) consists of a general purpose authoritative server, and multiple library (computer science), dynamically loadable Front and back ends, backends that both run multi-threaded. The core handles all packet processing and DNS intelligence, while one or more backends deliver DNS records u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hotspot (Wi-Fi)
A hotspot is a physical location where people can obtain Internet access, typically using Wi-Fi technology, via a wireless local-area network (WLAN) using a router connected to an Internet service provider. Public hotspots may be created by a business for use by customers, such as coffee shops or hotels. Public hotspots are typically created from wireless access points configured to provide Internet access, controlled to some degree by the venue. In its simplest form, venues that have broadband Internet access can create public wireless access by configuring an access point (AP), in conjunction with a router to connect the AP to the Internet. A single wireless router combining these functions may suffice. A private hotspot, often called tethering, may be configured on a smartphone or tablet that has a network data plan, to allow Internet access to other devices via password, Bluetooth pairing, or through the moeex protocol over USB, or even when both the hotspot devic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 * Caching resolver with prefetching of popular items before they expire * DNS over TLS forwarding and server, with domain-validation * DNS over HTTPS * DNS over QUIC * Query Name Minimization * Aggressive Use of DNSSEC-Validated Cache * Authority zones, for a local copy of the root zone * DNS64 * DNSCrypt * DNSSEC validating * EDNS Client Subnet History Originally designed by Jakob Schlyter of Kirei and Roy Arends of Nominet in 2004, funding was provided by VeriSign and ep.net to develop a prototype written in Java ( David Blacka and Matt Larson, VeriSign). In 2006, the prototype was re-written for high-performance in the C programming language by NLnet Labs. Unbound is designed as a set of modular components that incorporate modern features, such as enhanced security (DNSSEC) validation, Internet Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dbndns
dbndns was a fork of the djbdns software package, maintained by the Debian Project, made possible by the release of djbdns to the public domain. The fork was created so as to add many common patches to djbdns. Most notably, this now includes IPv6 support. Previously, it was necessary to get a special 'djbdns-installer' package that downloaded the djbdns source from the author's site and apply a patch, but the free software status means this is no longer necessary, and Debian can directly carry the source and patches, producing a redistributable binary deb package. This package had filtered through into Ubuntu. Dbndns is no longer maintained as part of the Debian distribution. See also * djbdns * Comparison of DNS server software This article presents a comparison of the features, platform support, and packaging of many independent implementations of Domain Name System (DNS) name server software. Servers compared Each of these Domain Name System, DNS servers is an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Private Network
In Internet networking, a private network is a computer network that uses a private address space of IP addresses. These addresses are commonly used for local area networks (LANs) in residential, office, and enterprise environments. Both the IPv4 and the IPv6 specifications define private IP address ranges. Most Internet service providers (ISPs) allocate only a single publicly routable IPv4 address to each residential customer, but many homes have more than one computer, smartphone, or other Internet-connected device. In this situation, a network address translator (NAT/PAT) gateway is usually used to provide Internet connectivity to multiple hosts. Private addresses are also commonly used in corporate networks which, for security reasons, are not connected directly to the Internet. Often a proxy, SOCKS gateway, or similar devices are used to provide restricted Internet access to network-internal users. Private network addresses are not allocated to any specific organizati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DNS Zone
A DNS zone is a specific portion of the DNS namespace in the Domain Name System (DNS), which a specific organization or administrator manages. A DNS zone is an administrative space allowing more granular control of the DNS components, such as authoritative nameserver. The DNS is broken up into different zones, distinctly managed areas in the DNS namespace. DNS zones are not necessarily physically separated from one another; however, a DNS zone can contain multiple subdomains, and multiple zones can exist on the same server. The domain namespace of the Internet is organized into a hierarchical layout of subdomains below the DNS root domain. The individual domains of this tree may serve as delegation points for administrative authority and management. However, it is usually desirable to implement fine-grained delegation boundaries so that multiple sub-levels of a domain may be managed independently. Therefore, the domain name space is partitioned into areas (''zones'') for thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dialup
Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line which could be connected using an RJ-11 connector. Dial-up connections use modems to decode audio signals into data to send to a router or computer, and to encode signals from the latter two devices to send to another modem at the ISP. Dial-up Internet reached its peak popularity during the dot-com bubble with the likes of ISPs such as Sprint, EarthLink, MSN Dial-up, NetZero, Prodigy, and America Online (more commonly known as AOL). This was in large part because broadband Internet did not become widely used until well into the 2000s. Since then, most dial-up access has been replaced by broadband. History In 1979, Tom Truscott and Jim Ellis, graduates of Duke University, created an early predecessor to dial-up Internet acce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wi-Fi
Wi-Fi () is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for Wireless LAN, local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves. These are the most widely used computer networks, used globally in small office/home office, home and small office networks to link devices and to provide Internet access with wireless routers and wireless access points in public places such as coffee shops, restaurants, hotels, libraries, and airports. ''Wi-Fi'' is a trademark of the Wi-Fi Alliance, which restricts the use of the term "''Wi-Fi Certified''" to products that successfully complete Interoperability Solutions for European Public Administrations, interoperability certification testing. Non-compliant hardware is simply referred to as WLAN, and it may or may not work with "''Wi-Fi Certified''" devices. the Wi-Fi Alliance consisted of more than 800 companies from ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C (programming Language)
C (''pronounced'' '' – like the letter c'') is a general-purpose programming language. It was created in the 1970s by Dennis Ritchie and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted Central processing unit, CPUs. It has found lasting use in operating systems code (especially in Kernel (operating system), kernels), device drivers, and protocol stacks, but its use in application software has been decreasing. C is commonly used on computer architectures that range from the largest supercomputers to the smallest microcontrollers and embedded systems. A successor to the programming language B (programming language), B, C was originally developed at Bell Labs by Ritchie between 1972 and 1973 to construct utilities running on Unix. It was applied to re-implementing the kernel of the Unix operating system. During the 1980s, C gradually gained popularity. It has become one of the most widely used programming langu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BIND
BIND () is a suite of software for interacting with the Domain Name System (DNS). Its most prominent component, named (pronounced ''name-dee'': , short for ''name Daemon (computing), daemon''), performs both of the main DNS server roles, acting as an authoritative name server for DNS zone, DNS zones and as a recursive Resolver (DNS), resolver in the network. As of 2015, it is the most widely used domain name server software, and is the De facto standard, ''de facto'' standard on Unix-like operating systems. Also contained in the suite are various administration tools such as nsupdate and dig (command), dig, and a DNS resolver interface library. The software was originally designed at the University of California, Berkeley (UC Berkeley) in the early 1980s. The name originates as an acronym of ''Berkeley Internet Name Domain'', reflecting the application's use within UC Berkeley. The current version is BIND 9, first released in 2000 and still actively maintained by the Internet Sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
