Difference between DNS stub zone and secondary zone

By -

What is a DNS STUB zone?

A stub zone is a copy of a zone that contains only those resource records
necessary to identify the authoritative Domain Name System (DNS) servers for
that zone. A stub zone is used to resolve names between separate DNS namespaces.
This type of resolution may be necessary when a corporate merger requires that
the DNS servers for two separate DNS namespaces resolve names for clients in
both namespaces.
The master servers for a stub zone are one or more DNS servers authoritative for
the child zone, usually the DNS server hosting the primary zone for the
delegated domain name.


What does a DNS stub zone consists of?

A stub zone consists of:
 The start of authority   (SOA) resource record, name server (NS) resource
records, and the glue A   resource records for the delegated zone.

The IP address of one or   more master servers that can be used to update the
stub zone.


Standard DNS Secondary Zone

A secondary name server gets the data for its zones from another name server
(either a primary name server or another secondary name server) for that zone
across the network. The data in a Secondary zone is Read only, and updated
information must come from additional zone transfers. The process of obtaining
this zone information (i.e., the database file) across the network is referred
to as a zone transfer. .
Secondary servers can provide a means to offload DNS query traffic in areas of
the network where a zone is heavily queried and used. Additionally, if a primary
server is down, a secondary server can provide some name resolution in the zone
until the primary server is available.

Comments

Post a Comment

Popular posts from this blog

Linux File and Directory Permissions

By -
Image
file & directory protection is a essential of any OS and Linux OS is no exception for it! These authorizations allow you to choose exactly who can access your files & directory, providing an overall improved system security. There was one of the major flaws in the older Windows operating-system where, by standard, all users can see each other people's information (Windows 95, 98, Me). For overcoming it, editions of the Windows based computer system such as NT, 2000, XP and 2003 lot more security features added. They fully support file & directory permissions, just as Linux system has since the beginning. Together, we'll now assess a directory listing from our Lab Linux system hosting server, to help us understand the information provided. a simple 'ls' command will give you the file and directory listing within a given directory, including the option  '-l' will display number of new areas that we are going to discuss here:
Read more

How to Disable SSL for Webmin

By -
Webmin is a Web application that enables administrators to manage Linux servers. Webmin runs on a Web server at port 10000. Miniserv is the name of the Web server application that handles the Webmin Web application. By default, Miniserv uses SSL. However, you can disable SSL for Webmin Miniserv by editing the configuration file for the Web application. With SSL disabled, you can access the Webmin application over a standard HTTP connection. Step 1 Open a terminal window on the Linux server. You can also SSH into the server if you do not have physical access to the machine. Step 2 Type the following command at the command prompt and press the “Enter” key: nano /etc/webmin/miniserv.conf This command opens the Miniserv configuration file in the Nano text editor.
Read more

INSTALL CISCO VPN CLIENT ON WINDOWS 10 (32 & 64 BIT). FIX REASON 442

By -
Image
This article shows how correctly install Cisco VPN Client (32 & 64 bit) on Windows 10 (32 & 64 bit) using simple steps, overcome the ‘ This app can’t run on this PC ’ installation error , plus fix the Reason 442: Failed to enable Virtual Adapter error message . The article applies to New Windows 10 installations or Upgrades from earlier Windows versions and all versions before or after Windows 10 build 1511 .  To simplify the article, we’ve broken it into the following two sections: How to Install Cisco VPN client on Windows 10 (clean installation or upgrade from previous Windows), including Windows 10 build prior or after build 1511 . How to Fix Reason 442: Failed to enable Virtual Adapter on Windows 10 Figure 1. The Cisco VPN Client Reason 442: Failed to enable Virtual Adapter error on Windows 10 HOW TO INSTALL CISCO VPN CLIENT ON WINDOWS 10 (NEW INSTALLATIONS OR O/S UPGRADES) The instructions below are for new or clean Windows 10 inst...
Read more