Domain Name Server (DNS) used for name resolving to any hosts. Master DNS servers ( Primary Server) are the original zone data handlers and Slave DNS server ( Secondary Server) are just a backup servers which is used to copy the same zone information’s from the master servers.
Step 6: Choose to continue. Choose to “Install and configured the DNS server on this computer. Microsoft Word - Setup Active Directory and DNS for Windows. Linux Server Step-by-Step Configuration Guide. There are daemons for the DNS name server. Based utility to help you configure and manage various aspects of. Step 1 Using a browser, open the home page of the system, for example, You can use the IPv4 or IPv6 address or the DNS name, if you have configured one. Use the management address. If your browser is not configured to recognize the server certificate, you will see a warning about an.
Master Server will resolve the names for every hosts which we defined in the zone database and use UDP protocol, because UDP protocols never use the acknowledgement process while tcp uses acknowledgement. DNS servers also use UDP protocols to resolve the query request at the earliest. Setup Master Slave DNS in RHEL/CentOS 6.5 How DNS Works? Understanding DNS might be little confusing for newbies. Here is a brief explanation on how the DNS work’s.
Let’s say, if we need to access any website what we will do? Just type www.google.com in browser and hit enter. Hmm that’s all we know, but the fact is, how pain DNS go through it, while querying for us. While we type www.google.com the system will look for www.google.com.
Whenever we type some domain name, there is a. ( dot) at the end of the www.google.com that say to search the root server of namespace.
Globally there are 13 root servers available to resolve the query. At first, while we hit enter as www.google.com our browser will pass a request to our local resolver, which has entry about our master and slave DNS server info.
If they don’t have info about such requested query they will pass the request to the Top Level domain ( TLD), if TLD say I don’t know the request, may be the authoritative server know your request, it will forward to authoritative servers, here only www.google.com was defined as address 72.36.15.56. In mean time authoritative server will give the answer to TLD and TLD will pass to root server and root will provide the info to browser, hence the browser will cache the DNS request for future use. Thus these long process will just resolve with in milliseconds. If they don’t know the request they will reply as NXDOMAIN. That means, there is no record any-were found in the Zone database. Hope this makes you to understand how the DNS works.
Read Also: My Testing Environment For this article, I’m using 3 machines, 2 for server setup (master and slave) and 1 for client. Create Zone File in DNS Following are the explanation of each configuration we used in above file. • listen-on port 53 – This is used for the DNS to listen in available interfaces.
• Master DNS – Define, your Master DNS IP address to listen the query. • Slave DNS – Define your Slave DNS, which is used to sync our zone information to resolve the hosts from Master. • recursion no – If its set to yes, recursive queries will make the server into DDOS attack. • Zone Name – Define your Zone name here defined as tecminlocal.com. • type master – As this system was configured for a master server, for upcoming slave server this will be slave. • tecmintlocal.fwd.zone – This file have the host information for this zone.
• allow-update none – If none will set. It won’t use Dynamic DNS (DDNS). Creating Master Zone Files At first let us define forward look-up zone entry. Here we need to create the zone files in the name of what we have define in the named.conf file as below.
Tecmintlocal.fwd.zone tecmintlocal. Rossini Introduction Theme And Variations Clarinet Pdf Sheet more. rev.zone We use sample configuration files for creating forward zone files, for this we’ve to copy the sample configuration files. $ sudo cp /var/named/named.localhost /var/named/tecmintlocal.fwd.zone $ sudo cp /var/named/named.loopback /var/named/tecmintlocal.rev.zone. Sample Zone File This is my forward zone configuration, append the below entry and make changes as per your need.