Mikrotik/RouterOS Script to update DDNS on No-IP (noip.com)

ddns_updater.rsc

# No-IP DDNS Updater
# http://www.noip.com/integrate/

:global publicIP;
:global abortUpdate;

:if ([:typeof $abortUpdate] != "bool") do={
	:set $abortUpdate false;
}

:if ($abortUpdate) do={
	:error "DDNS: Update aborted. Intervention required.";
}

:local currentIP;
:local targetInterface "<interface | auto>";

:local ddnsUser "<username>";
:local ddnsPass "<password>";
:local ddnsHost "<hostname>";
:local ddnsURL "http://dynupdate.no-ip.com/nic/update?hostname=$ddnsHost&myip=$currentIP";

:if ($targetInterface = "auto") do={
	:local response [/tool fetch url="http://luispaulo.net/ip" as-value output=user];
	:if ($response->"status" = "finished") do={
		:set currentIP ($response->"data");
	} else={
		:set currentIP "";
	}
} else={
	:set currentIP [/ip address get [/ip address find interface=$targetInterface] address];
	:if ([:typeof $currentIP] = nil) do={
		:error "DDNS: No IP obtained.";
	} else={
		:set $currentIP [:pick [:tostr $currentIP] 0 [:find [:tostr $currentIP] "/"]];
	}
}

:if ($currentIP != $publicIP) do={
	:local response [/tool fetch url=$ddnsURL user=$ddnsUser password=$ddnsPass as-value output=user];
	:if ($response->"status" = "finished") do={
		:local data ($response->"data");
		:set $abortUpdate (!([:pick $data 0 4] = "good" || [:pick $data 0 5] = "nochg"));
		:set $publicIP $currentIP;

		:log info "DDNS: Update succeeded."
	} else={
		:log error "DDNS: Update failed.";
	}
} else {
	:log info "DDNS: No IP change.";
}