Can I use 127.0 0.1 for DNS?


Can I use 127.0 0.1 for DNS?

Can I use 127.0 0.1 for DNS?

Proper domain controller DNS setup is vital for Active Directory to work properly. Best practice dictates that each domain controller should be setup with a different DNS server as it's preferred DNS server, and and the loopback address (127.0. 0.1) as it's alternate DNS server.

What does DNS server 127.0 0.1 mean?

127.0. 0.1 is the loopback Internet protocol (IP) address otherwise called the “localhost.” The address establishes an IP connection to the same machine or computer that is in use by the end-user. ... 0.1 loopback address happens in the same manner as determining one with any remote computer or device on the network.

Why do we use 127.0 0.1 for the hostname?

127.0. 0.1 is the loopback address, commonly known as localhost , which is the name that resolves to it by the local hosts file. This file is in different locations depending on the OS, but in most Linux distros it is in /etc/hosts . This address always refers to the computer which made the request, so 127.0.

Should DNS server point to itself?

Each DNS Server should point to the other as primary and itself as secondary. Per Technet, for Windows 2008: The network adapter does not list the loopback IP address as a DNS server, or it is configured as the first DNS server on this adapter.

Is a loopback address?

A loopback address is a special IP address, 127.0. 0.1, reserved by InterNIC for use in testing network cards. This IP address corresponds to the software loopback interface of the network card, which does not have hardware associated with it, and does not require a physical connection to a network.

Should I use 127.0 0.1 or localhost?

“The localhost is the default name describing the local computer address also known as the loopback address. ... 0.1 (the loopback address). When setting up a web server or software on a web server, 127.0. 0.1 is used to point the software to the local machine.”

What does IP 0.0 0.0 mean?

IP addresses in Internet Protocol (IP) version 4 (IPv4) range from 0.0. ... For example, instead of putting no IP address into the network area of a program, 0.0. 0.0 can be used to mean anything from accept all IP addresses or block all IP addresses to the default route. It's easy to confuse 0.0. 0..0.

What is the 127.0 0.1 address used for?

loopback traffic The address 127.0. 0.1 is the standard address for IPv4 loopback traffic; the rest are not supported by all operating systems. However, they can be used to set up multiple server applications on the host, all listening on the same port number.

What should I put as DNS server?

Some of the most trustworthy, high-performance DNS public resolvers and their IPv4 DNS addresses include:

  1. Cisco OpenDNS: 208.67. 222.2.67. 220.220;
  2. Cloudflare 1.1. 1.1: 1.1. 1.1 and 1.0. 0.1;
  3. Google Public DNS: 8.8. 8.8 and 8.8. 4.4; and.
  4. Quad9: 9.9. 9..112. 112.112.

How many DNS servers should I have?

At a minimum, you'll need two DNS servers for each Internet domain you have. You can have more than two for a domain but usually three is tops unless you have multiple server farms where you would want to distribute the DNS lookup load. It's a good idea to have at least one of your DNS servers at a separate location.

Is it good to have 127.0.1 as DNS server entry?

Active Directory: is it good to have as DNS server entry on 2 machines that are 2 DNS servers in a local net? This is a small local net with 10 computers in an office, they are running ms server 2003 active directory with 2 domain controllers. Each of the 2 DCs is also a DNS server and they syncronize.

Why does 127.0.1 in resolv.conf cause problems?

Using a dns server with a loopback address (e.g. causes problems: All other dns server with a lower priority are ignored by resolvconf. The priority of dns servers is defined by the network interfaces with which the dns-server is defined.

Where is the entry in NetworkManager?

The entry is most likely placed there by dnsmasq which is a local daemon for serving (and crucially caching) dns and dhcp. It's possible to configure NetworkManager to not run dnsmasq as follows: edit the file /etc/NetworkManager/NetworkManager.conf and comment out the line dns=dnsmasq by placing a # at the beginning of the line.

Which is the primary address for a DNS server?

If your DHCP server hands out the DNS server address as the primary DNS server, then the client host should use that as a DNS server. The client can of course set up a local forwarding nameserver like dnsmasq that listens on address, or whatever, but in this case the client alone is responsible that this setup works.

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