Mitrotik Router Dynamic DNS update script for Namecheap DDNS

update-namecheap-ddns

:log info "NamecheapDDNS: start updating..."

:global ddnspass "yourownddnspass"
:global theinterface "pppoe-out1"
:global ddnshost "subdomain"
:global ddnsdomain "example.com"
:global ipddns [:resolve "$ddnshost.$ddnsdomain"];
:global ipfresh [ /ip address get [/ip address find interface=$theinterface ] address ]

:if ([ :typeof $ipfresh ] = nil ) do={
   :log info ("NamecheapDDNS: No ip address on $theinterface .")
} else={
   :for i from=( [:len $ipfresh] - 1) to=0 do={ 
      :if ( [:pick $ipfresh $i] = "/") do={ 
    :set ipfresh [:pick $ipfresh 0 $i];
      } 
}
 
:if ($ipddns != $ipfresh) do={
   :log info ("NamecheapDDNS: IP-NamecheapDDNS = $ipddns")
   :log info ("NamecheapDDNS: IP-Fresh = $ipfresh")
   :log info "NamecheapDDNS: Update IP needed, Sending UPDATE...!"
   :global str "/update?host=$ddnshost&domain=$ddnsdomain&ip=$ipfresh&password=$ddnspass"
   /tool fetch address=dynamicdns.park-your-domain.com src-path=$str mode=https
   :delay 1
   :global str [/file find name="NamecheapDDNS.$ddnshost.$ddnsdomain"];
   /file remove $str
   :global ipddns $ipfresh
   :log info "NamecheapDDNS: IP updated to $ipfresh!"
   } else={
    :log info "NamecheapDDNS: dont need changes";
   }
}