Turns out this machine is a DNS server - it's time to get your shovels out. This is a very easy room to get familiar with DNS requests. Let's dig a dug.

This task is very simple. Just read the description and think clearly. First thing I did whas writing down the given information:

<IP_ADDRESS> is our DNS server

dig is the command we use to gather DNS information

givemetheflag.com is the domain name to investigate

Now that we know that, let's put it together in a one-liner:

dig @<IP_ADDRESS> givemetheflag.com

The @ parameter defines the DNS server we wanna use. This will provide us the information we need. The flag is in a TXT-record:

; <<>> DiG 9.18.1-1-Debian <<>> @10.10.36.217 givemetheflag.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37961
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;givemetheflag.com.             IN      A

;; ANSWER SECTION:
givemetheflag.com.      0       IN      TXT     "<FLAG>"

;; Query time: 31 msec
;; SERVER: 10.10.36.217#53(10.10.36.217) (UDP)
;; WHEN: Tue May 31 13:38:59 EDT 2022
;; MSG SIZE  rcvd: 86