Mikrotik

http://networkingforintegrators.com/2013/02/hairpin-nat-or-how-to-use-yo...

Script for 2.7


:global resolvedIP [ /ip address get [/ip address find interface=pppoe-adsl] address]
/ip firewall nat print
/ip firewall nat set [find comment=hairpin] dst-address=$resolvedIP


IP -> DNS Settings - > Allow Remote Requests -> Off

# Set needed variables
:local username "YourUserName"
:local password "YourPassword"
:local hostname "YourHostName"
:global ddnsinterface "YourInternetInterfaceWithDynamicIP"
:global ddnsip ""

:global dyndnsForce
# Remove the # on next line to force an update every single time - useful for debugging, but you could end up getting blacklisted by DynDNS!
#:set dyndnsForce true