Jun 06, 2017 · DNS (short for Domain Name System) is a service which translates IP address into domain name & vice-versa. 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
Newer versions of the Linux kernel use the /etc/nsswitch.conf file to determine what takes precedence: a local configuration file, a service such as DNS (Domain Name System), or NIS. As an example, the following hosts entry in the /etc/nsswitch.conf file says that the resolver library first tries the /etc/hosts file, then tries NIS+, and In order to configure dnsmasq as a DNS server, you have to modify this file. The default /etc/dnsmasq.conf file contains a lot of documentation and commented out options. So, I think it’s better to rename the /etc/dnsmasq.conf file to /etc/dnsmasq.conf.bk and create a new one. You can rename the configuration file with the following command: Dec 04, 2017 · Setting up a secondary DNS server is always a good idea as it will serve as a failover and will respond to queries if the primary server is unresponsive. On ns2, edit the named.conf.options file: # sudo nano /etc/bind/named.conf.options. At the top of the file, add the ACL with the private IP addresses for all your trusted servers: You add your custom DNS databases in the /var/named/ directory. Once the DNS databased are created, you add your custom zone files in the /etc/named/ directory and include the zone files in the /etc/named.conf configuration file. That’s basically how you configure BIND 9 DNS server. Let’s create a DNS database for linuxhint.local domain name. Now edit the name server configuration file as follows. [[email protected] ~]# vi /etc/named.conf. In that file add primary DNS server IP in listen on port 53 option. Enter IP range of hosts in the allow-query option. Add secondary DNS server IP in allow-transfer option. Configure the named.conf file by adding the following line in it. Unfortunately this uses a different configuration file that does not allow one to specify a DNS suffix. ps -ef | grep -i [d]hcp root 720 1 0 10:16 ? 00:00:00 /sbin/dhcpcd -q -w Fortunately this system came installed with resolvconf, which does have a configuration file /etc/resolvconf.conf that permits the specification of a DNS suffix:
Unfortunately this uses a different configuration file that does not allow one to specify a DNS suffix. ps -ef | grep -i [d]hcp root 720 1 0 10:16 ? 00:00:00 /sbin/dhcpcd -q -w Fortunately this system came installed with resolvconf, which does have a configuration file /etc/resolvconf.conf that permits the specification of a DNS suffix:
Oct 01, 2019 · /etc/named.conf The configuration file for the named daemon /var/named/ The named working directory which stores zone, statistic, and cache files If you have a chrooted BIND setup, as configured by the bind-chroot package, the BIND service will run in the /var/named/chroot environment. The default configuration of the /etc/named.conf file provides a caching-only nameserver. The file has four main sections described as follows. 1. options – Defines global server configuration options 2. logging – Enables logging – /var/named/data/named.run 3. zone – Specifies authoritative servers for the root domain – /var/named/named.ca 4. include – Specifies files to include Many people know and love Dnsmasq and rely on it for their local name services. Today we look at advanced configuration file management, how to test your configurations, some basic security, DNS wildcards, speedy DNS configuration, and some other tips and tricks. Next week, we’ll continue with a detailed look at how to configure DNS and DHCP. … Apr 07, 2017 · Listing 4: Add these lines to the named.conf file to add the Example.com zone file to the resolver configuration. Now restart named to make these changes take effect. Test your name server by using the dig and nsloookup commands to obtain the IP Addresses for the hosts you have configured in the forward zone file.
Click the DNS tab. The DNS configuration settings appear. Enter the IP addresses for the DNS servers that you want to use. If your network runs its own DNS server, you can specify its address here. Otherwise, you have to get the DNS server addresses from your ISP. Choose File→Save. Any changes that you’ve made to the network configuration
Jan 12, 2015 · Linux and Unix-like system uses Internet address (in dot notation) of a name server that the resolver should query to convert host names to IP address and vice versa. The resolver reads a configuration file called /etc/resolv.conf. The name server IP address are stored in /etc/resolv.conf file. Up to three name servers may be listed per line The DNS configuration in Debian. 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: DNS Config Under Linux. DNS usage on linux is done over a set of routines in the C library that provide access to the Internet Domain Name System (DNS). The resolver configuration file (resolv.conf) contains information that is read by the resolver routines the first time they are invoked by a process.