Restart dns service linux

Содержание
  1. Как запустить или перезапустить BIND DNS сервис (Named)
  2. Запуск DNS сервера Named
  3. Остановка сервиса Named
  4. Как перезапустить BIND
  5. How To Start / Stop / Restart / Enable / Reload The Bind (Named) DNS Service In Linux?
  6. What Is Bind DNS Server?
  7. 1) How To Start The Bind DNS Service In Linux?
  8. 2) How To Stop The Bind DNS Service In Linux?
  9. 3) How To Restart The Bind DNS Service In Linux?
  10. 4) How To Reload The Bind DNS Service In Linux?
  11. 5) How To View The Bind DNS Service Status In Linux?
  12. 6) How To Enable The Bind DNS Service On Boot In Linux?
  13. How to use the Linux BIND command to install and configure DNS
  14. How DNS works
  15. More Linux resources
  16. Where does DNS get IP addresses?
  17. Forward and reverse lookups
  18. Install and configure DNS
  19. Configure the /etc/named.conf file
  20. Define the forward and reverse zones
  21. Create forward and reverse zone files
  22. Add the nameserver IP to /etc/resolv.conf
  23. Start/restart and enable the named service
  24. Verify the DNS name resolution
  25. Query with nslookup
  26. Query with dig
  27. Wrap up
  28. How Do I Restart DNS service on Linux?
  29. Question: How To Check Dns In Linux Command?
  30. How do you check what DNS server you are using Linux?
  31. How do I find my DNS server?
  32. How do I get nslookup on Linux?
  33. How do I nslookup a specific DNS server?
  34. How DNS configure in Linux?
  35. How do I find my primary DNS?
  36. How do I find my DNS command prompt?
  37. How do I open my DNS server?
  38. What should my DNS BE?
  39. What does netstat do in Linux?
  40. What is nslookup command?
  41. How do I exit nslookup?
  42. How do I check DNS entry?
  43. How do I do a reverse DNS lookup?
  44. How do I find DNS name from IP address?
  45. How do I start DNS services in Linux?
  46. What is the DNS server in Linux?
  47. How does DNS work in Linux?
  48. How do I find my DNS 1?
  49. How do I find my primary DNS on my router?
  50. How do I find my DNS server on my smart TV?
  51. Is OpenDNS faster than Google DNS?
  52. What does changing your DNS do?
  53. Should I use OpenDNS?
  54. Which is the fastest DNS?
  55. What’s the fastest DNS server?
  56. What is the closest DNS server to me?

Как запустить или перезапустить BIND DNS сервис (Named)

Эту инструкцию я делаю как шпаргалку для себя на тему как запустить DNS-сервис BIND (он же Named), перезапустить или остановить его при необходимости. Надеюсь, что она сможет пригодиться и ещё кому-то.
BIND (Berkeley Internet Name Domain) — это открытая и очень популярная реализация DNS-сервера, которая обеспечивает выполнение преобразования DNS-имени в IP-адрес и наоборот. Она по праву считается самой первой системой ДНС и на сегодняшний день так же не теряет актуальность.

Для того, чтобы выполнять манипуляции с сервисом БИНД, необходимо зайти в систему с правами суперпользователя root. Вводим следующие команды:

Запуск DNS сервера Named

Эти базовые команды позволяют запустить сервис BIND из терминала Linux:

Остановка сервиса Named

Основные команды позволяют запустить сервис BIND из терминала Linux:

Как перезапустить BIND

Для того, чтобы перезагрузить Named и перезапустить сервис — выполните в консоли следующие команды:

Для того, чтобы посмотреть текущий статус работы DNS-сервера БИНД можно использовать такие команды:

Итак, мы с Вами рассмотрели самые основные команды для управления DNS-сервером Bind.

Источник

How To Start / Stop / Restart / Enable / Reload The Bind (Named) DNS Service In Linux?

systemd is a new system and service manager for Linux system, which was implemented/adapted into all the major Linux distributions over the traditional SysV init systems due to lots of issue/improvement has to be on SysVinit systems.

All the service files are available on /etc/init.d/ directory for SysVinit system.

For systemd system, the service files are available on /usr/lib/systemd/system/ directory.

If you would like to perform any kind of actions like start, stop, restart, enable, reload & status against the specific service then use the following commands.

Make sure that you should have admin privileges to run these commands except status command. It should be root or sudo permission needed to run the below commands.

What Is Bind DNS Server?

BIND stands for Berkeley Internet Domain Name. BIND or named is the Domain Name System (DNS) which is widely used in Linux/Unix system to perform DNS operations.

BIND is a single system that performs both authoritative and recursive DNS functions.

The named daemon controls the operation of a Bind dns server.

1) How To Start The Bind DNS Service In Linux?

Use the below commands to start the Bind/named server in Linux.

For SysVinit Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – Debian based systems such as Debian and Ubuntu.

2) How To Stop The Bind DNS Service In Linux?

Use the below commands to stop the Bind/named server in Linux.

For SysVinit Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – Debian based systems such as Debian and Ubuntu.

3) How To Restart The Bind DNS Service In Linux?

Use the below commands to restart the Bind/named server in Linux.

For SysVinit Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – Debian based systems such as Debian and Ubuntu.

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4) How To Reload The Bind DNS Service In Linux?

Use the below commands to reload the Bind/named server in Linux.

For SysVinit Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – Debian based systems such as Debian and Ubuntu.

5) How To View The Bind DNS Service Status In Linux?

Use the below commands to view the Bind/named server status in Linux.

For SysVinit Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – Debian based systems such as Debian and Ubuntu.

6) How To Enable The Bind DNS Service On Boot In Linux?

Use the below commands to enable the Bind/named server on boot in Linux.

For SysVinit Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – RHEL based systems such as Redhat, CentOS and Fedora.

For systemd Systems – Debian based systems such as Debian and Ubuntu.

The default configuration file is located at /etc folder.

rndc stands for Remote Name Daemon Control. rndc controls the operation of a name server. It supersedes the ndc utility that was provided in old BIND releases.

We can use this tool to check, how many dns zones were configured in the system.

Источник

How to use the Linux BIND command to install and configure DNS

Posted: August 30, 2021 |

The Domain Name System (DNS) is used to resolve (translate) hostnames to internet protocol (IP) addresses and vice versa. A DNS server, also known as a nameserver, maps IP addresses to hostnames or domain names.

In this article, you will learn the basics of DNS, from how DNS gets the IP address and hostname, to the concepts of forward and reverse lookup zones. It will also show you how to install and configure DNS, define and edit zone files, and verify whether the DNS can resolve to the correct address with the help of commands. If you are new to DNS, this article will help you play with it on your system using basic configurations.

How DNS works

When a client requests information from a nameserver, it usually connects to port 53, and then the nameserver resolves the name requested.

More Linux resources

Where does DNS get IP addresses?

You might wonder how DNS gets the IP of the corresponding hostname or domain name. How does DNS search among different IP addresses and associate your domain name correctly? Who stores those mappings between domain names and IP addresses?

The DNS workflow illustrates how communication happens within DNS and how it resolves the addresses.

Forward and reverse lookups

The forward lookup zone uses the domain name to search for IP addresses, whereas the reverse lookup zone uses IP addresses to search for the domain name.

Install and configure DNS

BIND is a nameserver service responsible for performing domain-name-to-IP conversion on Linux-based DNS servers.

The BIND package provides the named service. It reads the configuration from the /etc/named and /etc/named.conf files. Once this package is installed, you can start configuring DNS.

Configure the /etc/named.conf file

First, add or edit the two values in the options field. One is the DNS server address, and the other is the allow-query to any.

Here are the values from the above file:

  • 192.168.25.132 – DNS server address
  • any – matches every IP address

Define the forward and reverse zones

Define the forward and reverse zones in the /etc/named.conf or /etc/named.rfc1912.zones (you can define zones in either of those files). In this example, I am appending zone definition details to the /etc/named.rfc1912.zones file.

Create forward and reverse zone files

You also need to create forward and reverse zone files in the /var/named directory.

Note: By default, the named.conf file includes the /var/named directory for checking zone files. Sample zone files named.localhost and named.loopback are created during the installation of the BIND package.

Add the nameserver IP to /etc/resolv.conf

First, you must disable DNS processing by NetworkManager because it dynamically updates the /etc/resolv.conf file with DNS settings from its active connection profiles. To disable this and allow manual editing of /etc/resolv.conf , you must create a file (For example, 90-dns-none.conf ), as root in the /etc/NetworkManager/conf.d/ directory that contains the following:

Save the file and reload (restart) NetworkManager.

After you reload NetworkManager, it won’t update /etc/resolv.conf . Now, you can manually add the nameserver’s IP address to the /etc/resolv.conf file.

[ Be prepared in case something goes wrong. Read An introduction to DNS troubleshooting. ]

Start/restart and enable the named service

If the named service is not running or is disabled, then start and enable it. If it is already active (running) and you made all these configurations, you need to restart the service to make changes.

Verify the DNS name resolution

You have installed the BIND package, configured named files, created lookup zones, and restarted the service to make configurations take effect. Now use the nslookup and dig commands to check whether DNS is working properly and verify whether you are getting the intended results.

  • nslookup is a program to query internet domain name servers.
  • dig is a tool for interrogating DNS servers. It performs DNS lookups and displays the answers that are returned from the nameserver.
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Query with nslookup

Query with dig

Here is a forward lookup, where DNS responds with 192.168.11.132 as an IP for servera.example.com:

This example displays a reverse lookup, where the DNS server responds with servera.example.com as the domain name for 192.168.25.132:

[ Network getting out of control? Check out Network automation for everyone, a free book from Red Hat. ]

Wrap up

In this article, you learned what DNS is and how it works. Also, you now know what forward and reverse lookup zones are and how they work. You also learned how to install the BIND package, which is responsible for setting up DNS on the system and configuring the named files and lookup zones. Finally, you learned two commands, nslookup and dig , to interrogate DNS resolutions.

Источник

How Do I Restart DNS service on Linux?

Can anyone tell me how to restart my dns service on linux? I have tried /etc/init.d/named restart but receive a no such directory exists error. I don’t see a directoy called init.d so I assume that is the problem. However I have no idea where to go to restart this service beyond that. I really don’t know linux very well. Any help would be much appreciated.

what brand/version of linux are you running?

can you do a find for that service?

version is Linux 2.4.30 #10 SMP Thu Dec 20 20:58:18 MST 2007 i686 unknown unknown GNU/Linux

i did run a list of services and saw both inetd and named running.

I have no idea where the service is located to restart it though..

/etc/rc.d/init.d/named restart
should work

/usr/sbin/ndc restart
does the same

try locating it

find / -name named

should also point to the location

rpm -qa |grep bind

see if the directories are there. rhel by default chroots it, but the /etc/init.d/named file should still be there. You might not have installed the package

or maybe it’s not named you’re after

if this is redhat,

service named start

would start named

look for errors:

tail -f /var/log/messages

service named start

did not work..command not found

ok, let’s backup a bit here. Whar’s your linux flavor?

are you sure you’ve got named installed?

bash-2.05b# ps -Af | grep ‘named’
root 369 1 0 Jun01 ? 00:00:00 /usr/local/sbin/named
root 437 1 0 Jun01 ? 00:00:13 /usr/local/sbin/named
root 3298 1 0 13:20 ? 00:00:00 /usr/local/sbin/named
root 3314 1 0 13:20 ? 00:00:00 /export/source/bind-9.2.3/ bin/named/ named
root 3325 1 0 13:20 ? 00:00:00 /export/source/bind-9.6.0- P1/bin/nam ed/named

I posted the version of linux earlier..but looks like it might be running slackware..

Источник

Question: How To Check Dns In Linux Command?

How do you check what DNS server you are using Linux?

To check what DNS Server you are using on Linux, simply open up the terminal and do nslookup for any website.

Just type in the following command.

You can replace “google.com” with your own IP address as well.

How do I find my DNS server?

Type “ipconfig /all” at the command prompt, then press the “Enter” key. 3. Look for the field labeled “DNS Servers.” The first address is the primary DNS server, and the next address is the secondary DNS server.

How do I get nslookup on Linux?

nslookup followed by the domain name will display the “A Record” (IP Address) of the domain. Use this command to find the address record for a domain. It queries to domain name servers and get the details. You can also do the reverse DNS look-up by providing the IP Address as argument to nslookup.

How do I nslookup a specific DNS server?

How to use Nslookup to verify MX record configuration

  • Go to Start > Run and type cmd .
  • At a command prompt, type nslookup , and then press Enter.
  • Type server ;,where IP address is the IP address of your external DNS server.
  • Type set q=M X, and then press Enter.
  • Type , where domain name is the name of your domain, and then press Enter.

How DNS configure in Linux?

Configuration of DNS services under Linux involves the following steps:

  1. To enable DNS services, the “/etc/host.conf” file should look like this:
  2. Configure the “/etc/hosts” file as needed.
  3. The “/etc/named.conf” file should be configured to point to your DNS tables according to the example below.

How do I find my primary DNS?

To see your DNS servers, run ipconfig /all and scroll up to find the “DNS Servers” line. The first IP address is your primary server and the second is your secondary. DNS servers show up only when you include the /all option.

How do I find my DNS command prompt?

To find the IP address of your Windows® system:

  • Open a command window. For example, onWindows 7 systems, select Start > Run and enter cmd .
  • At the prompt, enter. ipconfig -all. Your system returns information like the following, including the IP address.

How do I open my DNS server?

Select Internet Protocol Version 4 (TCP/IPv4), then click the Properties button. Click the radio button “Use the following DNS server addresses:” and type in OpenDNS addresses, 208.67.222.222 and 208.67.220.220, in the Preferred DNS server and Alternate DNS server fields.

What should my DNS BE?

Public DNS Servers. Your home router is likely set by default to use your ISP’s DNS servers, which may or may not be very reliable. There are a number of third-party DNS servers available as well. Personally, I prefer OpenDNS (208.67.220.220 and 208.67.222.222) and Google Public DNS (8.8.8.8 and 8.8.4.4).

What does netstat do in Linux?

netstat (network statistics) is a command line tool for monitoring network connections both incoming and outgoing as well as viewing routing tables, interface statistics etc. netstat is available on all Unix-like Operating Systems and also available on Windows OS as well.

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What is nslookup command?

nslookup is a network administration command-line tool available in many computer operating systems for querying the Domain Name System (DNS) to obtain domain name or IP address mapping, or other DNS records.

How do I exit nslookup?

Running nslookup without specifying an IP address or domain name displays your router’s server and address. To get out of the > prompt, type exit and press Enter.

How do I check DNS entry?

How To Use NSLOOKUP to View Your DNS Records

  1. Launch Windows Command Prompt by navigating to Start > Command Prompt or via Run > CMD.
  2. Type NSLOOKUP and hit Enter.
  3. Set the DNS Record type you wish to lookup by typing set type=## where ## is the record type, then hit Enter.
  4. Now enter the domain name you wish to query then hit Enter..

How do I do a reverse DNS lookup?

City: You can use the form above to make reverse DNS lookups. Type in an IP address (for example 8.8.8.8) and press enter and the tool will make a reverse DNS lookup and return the name record for that IP address. If you want to see similar data of your website visitors, sign up for free to Leadfeeder.

How do I find DNS name from IP address?

Type “nslookup %ipaddress%” in the black box that appears on the screen, substituting %ipaddress% with the IP address for which you want to find the hostname.

How do I start DNS services in Linux?

You can start/stop/restart DNS service (named) via SSH using following commands on CentOS / RHEL / Fedora Linux:

  • To start DNS service (named) via SSH: /etc/init.d/named start.
  • To stop DNS service (named) via SSH: /etc/init.d/named stop.
  • To restart DNS service (named) via SSH: /etc/init.d/named restart.

What is the DNS server in Linux?

Domain Name Service (DNS) is an internet service that maps IP addresses to fully qualified domain names (FQDN) and vice versa. BIND is the most common program used for maintaining a name server on Linux.

How does DNS work in Linux?

The DNS is the default name resolution service used in UNIX (configurable option) and Windows servers. However, when the Internet was very small, hostname resolution was done using /etc/hosts file under UNIX. The hosts file is a computer file used by an operating system to map hostnames to IP addresses.

How do I find my DNS 1?

Type or paste the “ipconfig /all” command (without the quotation marks) into the Command Prompt and press “Enter” to run it and get detailed information about the network. Locate the IP address of the computer in the “IPv4 Address” field. Locate the primary DNS IP address in the “DNS Servers” field.

How do I find my primary DNS on my router?

How to Find Your IP Address, Primary DNS & Default Router

  1. Move your cursor from the top right portion of the screen in a downwards motion to display the Charms bar, and then click the “Search” option.
  2. Type “cmd” (omit the quotes here and throughout) into the Search box, and then select “Command Prompt” from the list of results.
  3. Type “ipconfig /all” into the Command Prompt.

How do I find my DNS server on my smart TV?

Part II. Change your Samsung Smart TV DNS server addresses

  • Press “Menu” button on your remote.
  • Under “Settings menu” select “Network” (1) then choose “Network Status” (2).
  • After several seconds you will see 3 buttons.
  • Choose “DNS setting” (4).
  • Select “Enter manually” (5).
  • Enter the SmartyDNS DNS addresses (6).

Is OpenDNS faster than Google DNS?

Faster than Google and OpenDNS. Google also has a public DNS (8.8.8.8 and 8.8.4.4 for IPv4 service, and 2001:4860:4860::8888 and 2001:4860:4860::8844 for IPv6 access), but Cloudflare is faster than Google, and faster than OpenDNS (part of Cisco) and Quad9.

What does changing your DNS do?

A Few Good Reasons to Switch Your DNS Server. DNS stands for “Domain Name System.” A DNS service/server is a network component that translates the name of the website you want to visit into the IP address that matches that website. That has to happen for the Internet to make the right connection.

Should I use OpenDNS?

Here’s why: Unlike the DNS servers of your less reliable ISP, OpenDNS servers store the IP addresses of millions of websites in their cache so it would take less time to resolve your requests. Another huge advantage of using OpenDNS is that it blocks phishing websites from loading on your computer.

Which is the fastest DNS?

15 Fastest Free and Public DNS Servers List

DNS Provider Name Primary DNS Server Secondary DNS Server
Google 8.8.8.8 8.8.4.4
OpenDNS Home 208.67.222.222 208.67.220.220
CloudFlare 1.1.1.1 1.0.0.1
Quad9 9.9.9.9 149.112.112.112

What’s the fastest DNS server?

  1. OpenDNS. Primary, secondary DNS servers: 208.67.222.222 and 208.67.220.220.
  2. Cloudflare. Primary, secondary DNS servers: 1.1.1.1 and 1.0.0.1.
  3. Google Public DNS. Primary, secondary DNS servers: 8.8.8.8 and 8.8.4.4.
  4. Norton ConnectSafe.
  5. Comodo Secure DNS.
  6. Quad9.
  7. Verisign DNS.

What is the closest DNS server to me?

Our list contains 8 of the best DNS servers to use this year:

  • Google’s Public DNS Server. Primary DNS: 8.8.8.8.
  • Norton ConnectSafe. Primary DNS: 199.85.126.10.
  • OpenDNS. Primary: 208.67.222.222.
  • DNS Watch. Primary: 84.200.69.80.
  • Comodo Secure DNS. Primary: 8.26.56.26.
  • Verisign. Primary: 64.6.64.6.
  • OpenNIC.
  • GreenTeamDNS.

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