Simple Script for Dynamic IP Public on Mikrotik Using no-ip.

# Set needed variables
 :global username "yourname"
 :global password "yourpasswd"
 :global hostname "yourhostname"
 :global wanInt "waninterface"
 :global noipForce
 :global previousIP2
# print some debug info
 #:log info ("DDNS: username = $username")
 #:log info ("DDNS: password = $password")
 :log info ("DDNS: hostname = $hostname")
 :log info ("DDNS: previousIP = $previousIP2")
# Grab the current IP address on that interface.
 :global ddnsip [/ip address get [/ip address find interface="$wanInt"] address]
 :global currentIP [:pick $ddnsip 0 [:find $ddnsip "/"]]
#:log info ("DDNS: ddnsip = $ddnsip")
 :log info ("DDNS: currentIP = $currentIP")
# Remove the # on next line to force an update every single time - useful for debugging, but you could end up getting blacklisted by No-IP!
 #:set noipForce true
# Determine if no-ip update is needed
 # more no-ip updater request details available at http://www.no-ip.com/integrate/request/
 :if (($currentIP != $previousIP2) || ($noipForce = true)) do={
 :set noipForce false
 :set previousIP2 $currentIP
 :log info ("DDNS: No-IP update needed")
 :log info ("DDNS: Start of Fetch")
 global tmp [/tool fetch mode=http port=80 address=dynupdate.no-ip.com host=dynupdate.no-ip.com src-path="/nic/update?hostname=$hostname&myip=$currentIP" user=$username password=$password dst-path="/noip2.txt"]
 :log info ("DDNS: End of Fetch")
 :global result [/file get noip2.txt contents]
 :log info ("DDNS: No-IP Update Result: $result")
 :put ("No-IP Update Result: $result")
 # Update HE.net Tunnel
 #   :execute script=HE-NET
 } else={
 :log info ("DDNS: No No-IP update needed")
 }