NSLOOKUP DNS tool

I find nslookup a very good tool when trouble shooting DNS records, here are some examples on how it can be used.

 

Note you can use this on Linux,Windows and MAC.

If you opened up your command prompt and type in nslookup.

first let tell nslookup which dns server to query

server 8.8.8.8

in my example I’m using google public dns server

let says you want to find the IP address of example.org

you would just type in

example.org

 

Now lets say you want to see what dns server example.org uses

 

type in

set type=ns

Now type in example.org

 

Let check what mail server gmail.com uses ( example.org didnt have any records so I decided to use gmail)

type in

 

set type=mx

now type in gmail.com

 

Let also check what spam filter gmail uses

type in

set type=txt

type in now gmail.com

 

 

Other type of records you would most commonly look at are A and CNAME

set type=CNAME

set type=A

 

 

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