# Now-DNS automatic Dynamic DNS update

#--------------- Change Values in this section to match your setup ------------------

# No-DNS User account info
:local NowUser "your_email"
:local NowPass "your_password"

# Your hostname you want to update
# To specify multiple hosts, separate them with commas.
:local NowHost "freeddns.now-dns.org"

#------------------------------------------------------------------------------------

:local url "https://now-dns.com/update\3F"

:log info "Now-DNS: sending update for $host"

/tool fetch url=($url . "hostname=$NowHost") user=$NowUser password=$NowPass mode=https dst-path=("now-dns.txt")

:log info "Now-DNS: host $host updated with IP $currentIP"

# Now-IP automatic Dynamic DNS update

#--------------- Change Values in this section to match your setup ------------------

# No-IP User account info
:local username "login@domain.net";
:local password "password";

# To specify multiple hosts, separate them with commas.
:local hostnames "host.now-ip.net,host.myiphost.com";

# Global interface name
:local wanInterface "ether1-gateway";

#------------------------------------------------------------------------------------

# Get current wan interface ip address.
:local currentIP;
do {
  :set currentIP [:local ip [/ip address get [find interface=$wanInterface] address]; :pick $ip 0 [:find $ip "/"]];
  :log debug "current ip $currentIP"
} on-error={
  :log error "can`t get ip address on the interface '$wanInterface'";
  :error;
}

# Check match dns records
:local match true;
:local resolvedIP;
:foreach hostname in=[:toarray $hostnames] do={
  do {
    :set resolvedIP [:resolve $hostname];
  } on-error={
    :log error "can`t resolve hostname '$hostname'";
    :set match false;
  }
  :if ($resolvedIP != $currentIP ) do={
    :set match false;
    :log debug "resolved '$hostname' ip address $resolvedIP no match to current $currentIP";
  } else {
    :log debug "resolved '$hostname' ip address match to current $currentIP";
  }
};

# Update dns records if no match
:if (match != true ) do={
  :local url "https://now-ip.com/update\3F";
  :log info "Now-IP: sending update for '$hostnames'";
  /tool fetch url=($url . "hostname=$hostnames" . "&myip=" . $currentIP) user=$username password=$password mode=https dst-path=("now-ip.txt");
  :local result [/file get "now-ip.txt" contents];
  :log info "Now-IP: host $host updated with $result";
} else {
  :log info "Now-IP: dns resolved corect";
}

:local username "*************";
:local password "*************";
:local hostnames "*************";
:global LIST "ip-dns";
#------------------------------------------------------------------------------------

# Get current external IP
:global previousIP
:local currentIP [/tool fetch url="http://myip.dnsomatic.com/index.html" mode=http dst-path=currentIP; :delay 1; /file get currentIP contents; /file remove currentIP]
/ip firewall address-list set [find list="$LIST"] address="$currentIP";
:if ($previousIP != $currentIP ) do={
  :log info "now-dns: Found a different ip address $currentIP"
  :set previousIP $currentIP
} else {
  :log info "now-dns: Your ip address is up to date $currentIP";
}

# Update dns records
:local url "https://now-dns.com/update\3F";
/tool fetch url=($url."hostname=".$NowHost."&myip=".$currentIP) mode=https user=$username password=$password src-path=$path keep-result=no;
:log info "now-dns: host $hostnames updated with ip $currentIP";