freenom-ddns.sh

#!/bin/bash
# Autochange both @ and www records at freenom.com with dynamical IP.
# Extended from https://gist.github.com/tkidd77
# Added:
# - admin e-mail notifications;
# - old IP memory for not to touch freenom each time if new IP is the same (stored in /etc/current-ip).
# October 2016 > working well
# Just put your values below, then make crontab task for this script
info_mail="mail-for-notifications@mailbox"
freenom_email="your-freenom-registration@mailbox"
freenom_passwd="password"
freenom_domain_name="your-domain.com"
freenom_domain_id="0000000000"
current_ip="$(curl -s "ident.me")"
if [ "${current_ip}" == "" ]; then
    current_ip="$(curl -s "https://api.ipify.org/")"
fi
if [ "${current_ip}" == "" ]; then
    echo "Empty new IP" | mail -s "Your server - IP" "${info_mail}"
    exit 0
fi
old_ip="$(cat "/etc/current-ip")"
if [ "${current_ip}" == "${old_ip}" ]; then
    exit 0
fi
echo $current_ip > /etc/current-ip
cookie_file=$(mktemp)
loginResult=$(curl --compressed -k -L -c "${cookie_file}" \
    -F "username=${freenom_email}" -F "password=${freenom_passwd}" \
    "https://my.freenom.com/dologin.php" 2>&1)
if [ "$(echo -e "${loginResult}" | grep "/clientarea.php?incorrect=true")" != "" ]; then
    echo "Freenom login fail" | mail -s "Your server - IP" "${info_mail}"
    exit 0
fi
updateResult=$(curl --compressed -k -L -b "${cookie_file}" \
    -F "dnsaction=modify" -F "records[0][line]=" -F "records[0][type]=A" -F "records[0][name]=" -F "records[0][ttl]=14440" -F "records[0][value]=${current_ip}" \
    -F "dnsaction=modify" -F "records[1][line]=" -F "records[1][type]=A" -F "records[1][name]=www" -F "records[1][ttl]=14440" -F "records[1][value]=${current_ip}" \
    "https://my.freenom.com/clientarea.php?managedns=${freenom_domain_name}&domainid=${freenom_domain_id}" 2>&1)
if [ "$(echo -e "$updateResult" | grep "<li class=\"dnssuccess\">")" == "" ]; then
    echo "Freenom update fail" | mail -s "Your server - IP" "${info_mail}"
    exit 0
fi
curl --compressed -k -b "${cookie_file}" "https://my.freenom.com/logout.php" > /dev/null 2>&1
rm -f ${cookie_file}
echo "Freenom IP update OK" | mail -s "Your server - new IP OK" "${info_mail}"
exit 0