Jun 06, 2017 · In environment with only a limited numbers of Linux machines, we can make entries in /etc/hosts file for associating an IP address with a name but when you have a large infrastructure with lots and lots of systems/resources, /etc/hosts will not work. For these kind of scenarios, we implement BIND (DNS) in our environment.
Jun 01, 2020 · A DNS server can store and manage multiple zone files, and they can be a mixture of primary and secondary zones. In out analogy John could have a copy of TeamB list in case Fred goes on holiday. Therefore a DNS server can be both a primary and secondary name server. As DNS is an important service being able to troubleshoot it is a useful skill. By default Linux will first check it’s local host file /etc/hosts before querying DNS servers defined in /etc/resolv.conf. It is important to confirm that the correct DNS servers have been specified within this file and that you can connect to them on TCP/UDP port 53. First we will look at the file /etc/resolv.conf. This is the main configuration file library name resolver DNS. The resolver is a library in the language C, it provides access to DNS for programs in the system. Its functions are configured to the following: Each DNS zone file contains records that consist of a number of entries. As a Linux user or administrator, these records will guide Internet users to your website. The entries are also known as resource records and can vary ever so slightly in format. The following sections examine the most common record types. Edit the file /etc/netsvc.conf so that the “host =” will be pointing to local and dns as in the following hosts=local,bind For Solaris and Linux, Enable the name resolving using DNS as follows: Edit the file /etc/nsswitch.conf so that the “host:” will be pointing to local and dns as in the following hosts: files dns B)VALIDATION
Apr 03, 2019 · Cross-platform support is important for importing and exporting zone files, because the most common name server software, BIND, typically runs on Linux. Obtain your existing DNS zone file. Before you import a DNS zone file into Azure DNS, you need to obtain a copy of the zone file.
DNS Configuration and Data Files In addition to the in.nameddaemon, DNS on a name server consists of a configuration file called named.conf, a resolver file named resolv.conf, and four types of zone data files. Names of DNS Data Files So long as you are internally consistent, you can name the zone data files anything you want. Jun 01, 2020 · A DNS server can store and manage multiple zone files, and they can be a mixture of primary and secondary zones. In out analogy John could have a copy of TeamB list in case Fred goes on holiday. Therefore a DNS server can be both a primary and secondary name server.
Dec 13, 2019 · resolv-file, DNS resolver file used by dnsmasq to resolve from internet. addn-hosts, use a additional host file, very useful. neg-ttl, it determines the DNS request TTL values, by default set to 3600 seconds. domain-needed, it prevents forwarding invalid or specific DNS quarries to upstream DNS servers.
Sep 29, 2010 · This article will walk through changing an A record from the Linux command line. This article assumes that you are running BIND on a linux server, that you already have an understanding of what DNS is, the different types of DNS entries, and how DNS works. Please note: The incorrect editing of your zone file can take your site offline.