Question

Using the nslookup command show how to do the following:

a- List the NS resource record(s) only and identify the computer name in the corresponding resource record

b- Write the command to list all resource records in a DNS table, for domain nwlab.edu?

c- Write the command to list all resource records with type A in a DNS table, for domain nwlab.edu?

d- Write the command to list all canonical names and aliases in the DNS server table?

Answer 1

(a) To check a specific DNS record, you need to specify the nslookup command, an optional record type (for example, A, MX, or TXT), and the host name that you want to check. By default the record type chosen is A if you leave to specify)

(b)

1. type nslookup to enter the specification control
2. then set type of record among the A, AAAA, A+AAAA, ANY, CNAME, MX, NS, PTR, SOA, or SRV .
3. enter the domain name of choice and hit enter

Commands:

nslookup
> set type=ANY      
> nwlab.edu

(c)

nslookup
> set type=A       
> nwlab.edu

(d)

nslookup
>ls -a YOURDOMAINE
>ls -t CNAME