Hello Friends will come back in this list and we're going to talk about local DNS server.
So what is DNS server DNS server is responsible for resolving and domain name and IP address.
OK so when would we type in the domain name in the browser then the DNS server finds the corresponding
IP address of the Web site.
OK.
And I find that web site for us and the users and the access to that Web site.
OK.
So the NSA was responsible for finding the IP addresses of the domain names.
OK.
That we type into the browser.
OK.
So in this lesson we're going to talk about hope to get the information about the DNS servers in case
there is a problem on our system of order DNS server.
Then we can easily resolve that.
So there are few tools.
OK which can be used to get information about the DNS service so that it practically could do this.
OK come on that I would like to show you business lookup then look up.
Come on.
Is used to find the information about the DNS server.
OK.
So there are two more so it can start DNS look up the Vinnies non-direct two more.
And the other is interacting more.
So first of all I would like to show you how to use the come on with non-interactive more.
OK.
So the non indirect do more is like this.
First you need to tap the command and after that you need to type the domain name.
OK so I want to get the information about you want to dot com and Agentur OK.
After hitting the come on like this here you can see we get the information about the IP address of
Ubuntu to dot com and the local DNS service.
OK on this Linux machine.
Ok that is going to $7.00 53 getting spare you can get the basic information in this form.
OK.
If you want to read different records about any domain then you can do like this Suppose you want to.
Q. Re and ex-Director and remixer of course is a mail exchange record.
OK which is responsible for whenever some mail send one to the can.
Then it confirms that that mail actually sent to that domain.
OK.
So you read that in Q3 Google Maps and this will find the exchange rate call for one to dot com.
So here you can see it is not authorized to Onsen for one credit card.
And in the record.
Then again you scan on a credit card.
It is a record for this domain.
You can also search for any records.
So what is DNS record in this record is name service.
Or you can call the DNS service.
So find the names or records for google.com just replace a mix in this and hit enter.
And here you can see you get the names server records for one to dot com.
So there are four names there was and this one is for history and this too.
OK.
These are the names or words which are reserved for Ubuntu to on.
You can so it is a start up authority for quotes.
We just replaced that.
This Okay and hit enter.
OK.
So you will get the recourse like this.
OK.
That is it gives the origin and this one canonically dot com then milah address post-master dot canonically
dot com then serial number of that domain refresh retry expired and minimum.
OK this information you will get with this very close if you want to see all the recalls so of this
you want to dot com then you can do here like this.
Just type in and hit enter.
And here you can see it will use you all the information about that domain.
OK.
It contains all these records.
OK.
So in this way you can read information about a DNS server with the help of descendants look up.
There is a technique called a reverse DNS lookup.
So to perform reverse DNS lookup what you need to do is you need to port an IP address.
So here you can see the IP address of this will want to dot com is 9 1.
Got 1 9 9 4 4 0 unique IP address.
OK instead of domain name and hit enter.
Now here you can see it will give you this information after performing the was DNS look up and get
in this way you can perform all these operations with the help of NSA look up come on.
So after performing this I want to show you in our Are the thing that you can perform a port based operations.
OK.
Suppose you want to perform on port number 34.
So what you need to do is work and then you specify the port and Roy the domain name.
You can performant port specific during formation operation here like this really good because that
does not actually sit there the by default port is 53 when you are performing any lookup operation.
And that is why it's not doing any proper answer.
OK.
Just FYI you can perform all these operation in non-intersecting more.
So now let me show you how to perform these operations with.
Interact do more.
So get inside like two more and just hit enter.
OK now we are inside the interactive mall.
So suppose I want to search for a MX record.
So type here said Max now after this.
I don't mean suppose I want to do this for event but OK now this used information about them it's a.
And you can perform this operation all for multiple domains.
This is the difference in between are not in direct doing and direct to more.
So suppose I want do it for code of line of code which is my domain on my website just to enter and
this will use this information so what you want to call form and this information source that I will
ruinous and Guri who want to also strive for Google dot com
and this will use this information about in service of Google or dot com only in this way you can perform
all these operations in indirect do more.
And if you want to see all the records then just take it out equal any and then domain name
in this very group or from the operations.
In fact two more if you want to quit type exit here this is the way by which you can get information
about your name servers or MX records and by getting that info you can actually get the point that exactly
where the problem.
OK suppose your domain is not working properly.
If it goes off line or wait for any problem you can search for this information whether it is properly
configured or not.
Good by knowing this you will debug the problems about the DNS.
OK so the next come on which is the smooth.
Come on Blake.
Look up.
Let me show you are the companies they've come on you can perform the same operations on any domain.
So suppose I want to perform one on and this use this information to not look like the IP address of
Ubuntu and other information that Guri time server address means the local DNS server address.
And this sunset is very long.
You don't need this kind of ugly output.
So if you want a short answer you just need to type and shot and hit enter and then you will find this
answer in this short form.
Ok suppose you want to find the MX record and then just type here Max.
Enter.
And this would use this short answer.
If you remove this you will get this long are the answer.
OK.
If you want to search for this right or just Despite this short and this gives you the names or information
about when to go you can also perform for different records like it's all and for all records.
Just like any this would use all the information you can also perform and he was the D.A. look at this.
So what that described IP address 9 1 9 1 door 1 9 8 9 4 4 4 0 He's not giving any answer.
Just type the AGI like this.
You'll get an answer in this way you can perform all these operations here.
But it did come on the command line it came the fore multiple domain names that one.
So suppose I want to get a phone call off line call for this record then shut and for one I want to
perform a MX record.
Or you can do it in small shot.
Let's see what happens.
There is a spelling mistake for hope to one to call it in this way.
You will get the information about the multiple domains with this technique and this way that command
can be used and there is another command which is used to perform the same operations the command is
horse meat horse.
You get the same information like a book of like sort of like dog gone.
OK.
Like this here you display the IP address of call up line dot com and if you want to see a particular
call like go en masse in this and then just type here the.
And then Amex.
Force suppose I want to do it for Google then Google dot com like this you will get the info for a particular
record and if you want to see all the records and then just type hi for me and enter OK you need to
remove these hammocks and OK in this way.
This will give us all the information regarding Google dot com domain.
Ok to news there Eric or the A Eyrecourt in Mexico in hysterical cédric or DXi soy.
All these records can be found here about Google dot com in this way you can cue the DNS filtered information
with the properties come on.
OK on your Linux system and if you have any problem about your domain or anything like that you will
resolve that by getting this information.
OK.