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#! /usr/bin/env nix-shell
#! nix-shell -p dig -p dash -i dash --impure
# shellcheck shell=dash
get_dns_types() {
cat <<EOF
A
AAAA
CAA
CNAME
DNAME
MX
NS
SOA
SRV
TXT
PTR
DNSKEY
DS
SSHFP
TLSA
OPENPGPKEY
SVCB
HTTPS
EOF
}
check_type() {
domain="$1"
type="$2"
if [ "$(dig +short -t "$type" "$domain" | wc -c)" -ne 0 ]; then
dig +short -t "$type" "$domain" | while IFS="$(printf "\n")" read -r output; do
printf "(%s) %s [%s]\n" "$type" "$output" "$domain"
done
else
printf "(%s) <Not set> [%s]\n" "$type" "$domain"
fi
}
get_dns() {
original_domain="$1"
get_dns_types | while read -r type; do
check_type "$original_domain" "$type"
done
# DKIM
check_type "mail._domainkey.$original_domain" "TXT"
# DMARC
check_type "_dmarc.$original_domain" "TXT"
}
get_dns "$1"
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