How do I configure BIND as a public network DNS server on CentOS 7?

How do I configure BIND as a public network DNS server on CentOS 7?

How do I configure BIND as a public network DNS server on CentOS 7?

How To Configure DNS (BIND) Server on CentOS 7 / RHEL 7

  1. yum -y install bind bind-utils Copy.
  2. vi /etc/named.conf Copy.
  3. // listen-on port 53 { 127.0.0.1; }; // listen-on-v6 port 53 { ::1; }; Copy.
  4. listen-on port 53 { 127.0.0.1; 192.168.0.10; }; Copy.
  5. allow-query { localhost; 192.168.0.0/24; }; Copy.
  6. vi /etc/named.conf Copy.

What is the benefit of implementing BIND in chroot jail?

The main benefit of a chroot jail is that the jail will limit the portion of the file system the DNS daemon program can see to the root directory of the jail. Additionally, since the jail only needs to support DNS, the programs related to ISC BIND/DNS available in the jail can be extremely limited.

What is DNS BIND in Linux?

BIND is a nameserver service responsible for performing domain-name-to-IP conversion on Linux-based DNS servers. [root@servera ~] # yum install bind. The BIND package provides the named service. It reads the configuration from the /etc/named and /etc/named.

How do I use BIND9?

Install BIND9

  1. The first thing you need to do is to update the package list and to install BIND9.
  2. After the installation process is complete, you can check if BIND9 is working.
  3. The DNS server works right after installation.
  4. The main configuration file is named.
  5. Some of the available options are listed below.

How do I configure BIND as a caching or forwarding DNS server on CentOS 7?

Table of Contents show

  1. My Lab Setup :
  2. Step 1 : Installing BIND9 on CentOS 7.6.
  3. Step 2 : BIND Server Configurations.
  4. Step 3 : SELinux Permission.
  5. Step 4 : Test my bind configuration for any syntax errors.
  6. Step 5 : restart the bind service.
  7. Step 6 : Firewall Configuration.
  8. Step 7 : Test Caching Only DNS.

How do I find my DNS server on CentOS?

CentOS DNS config files are found conveniently in /etc/sysconfig/network-scripts/ . Here you’ll also find options to configure your IP, gateway, and DNS server and will find information like the hardware address and UUID.

How is chroot implemented?

To implement a chroot jail, create the new root directory structure and copy all the necessary files into this new root directory before running the chroot command.

Is Docker just chroot?

It’s an open source project and provides the same basic functionality the Docker engine does but without root privileges. It works by creating a chroot -like environment over the extracted container and uses various implementation strategies to mimic chroot execution with just user-level privileges.

How do I check if my DNS server is binding?

Checking BIND’s zone files and configuration

  1. To check the configuration files run a following Linux command: $ sudo named-checkconf.
  2. To check the DNS zone files we can use named-checkzone command: $ sudo named-checkzone linuxconfig.org /etc/bind/zones/master/db.linuxconfig.org zone linuxconfig.org/IN: loaded serial 1 OK.

How do I create a zone file in BIND?

Register Hosts Records into the Domain

  1. Open the zone’s database file into a text editor. nano /var/named/serverlab.intra.db.
  2. After the SOA and NS records, add the Address (Host) records for your servers.
  3. Save your changes and exit the text editor.
  4. Have Bind reload the zone.

How do I add a new domain to BIND DNS?

To add a new domain, you need to edit two files related to Bind DNS server….Adding an entry to Named. conf:

  1. Login with SSH as root.
  2. Open the file /etc/named. conf in any text editor.
  3. At the end of the file, add the zone entry for domain.com in the following format:

How to install bind in chroot environment?

To install BIND running in a chroot environment, you have to install the bind-chroot package. If you do not have an active repository then download rpms with all the list of dependencies using which then you can create an offline repository.

Where are the chroot configuration files placed?

After setting Chroot environment, configuration files are placed under [/var/named/chroot]. [named.conf] is placed under [/var/named/chroot/etc/named.conf], zone files are placed [/var/named/chroot/var/named/***]. When modify settings, Change them under [/var/named/chroot] files.

How do I mount a DNS server in chroot?

Turn ON the bind chroot environment, with this all your Bind DNS server related files and directories will be mount on /var/named/chroot If you have installed the bind chroot package, the BIND service will run in the chroot environment.

Is it possible to organize DNS server settings in chroot?

You can organize everything as you would with BIND not running in a chroot environment. Chrooted Bind DNS server was by default configured to /var/named/chroot.