freedomain DynDNS for mikrotik

freedomain.rsc

# MikroTik Script: freedomain.rsc
# Purpose: Update DNS records dynamically

:local apiKey "api_key"
:local domain "example.com,example.org"

:local fileName "last_pppoe_ip.txt"
:local lastIP
:local currentIP

:if ([/file find name=$fileName] = "") do={
    /file print file=$fileName
    :log info "File $fileName created."
}

:if ([/file find name=$fileName] != "") do={
    :set lastIP [/file get [/file find name=$fileName] contents]
}

# command to get ip from pppoe interface
:set currentIP [/ip address get [find interface="pppoe-out1"] address]

:if ($currentIP != $lastIP) do={
    :local url "https://api.dnsexit.com/dns/ud/?apikey=$apiKey"
    /tool fetch url=$url http-method=post http-data="host=$domain" mode=https dst-path=/dev/null keep-result=no
    :file set [/file find name=$fileName] contents=$currentIP
    :log info "DNS record for $domain updated to $currentIP."
} else={
    :log info "No changes in IP address. Update not required."
}