DNS

apt update && apt install -y dnsutils

Задаем домен

DOMEN=eas.pp.ua

NS record

dig $DOMEN NS +short

А record

dig $DOMEN a +short

MX record

dig $DOMEN mx | grep -v "^;"

SPF record

dig $DOMEN txt | grep -v "^;"

DMARC record

dig _dmarc.$DOMEN txt | grep -v "^;"

Обратная зона - PTR record

dig -x 144.76.74.132 +short