I have Mikrotik CCR 001 which is supplying internet to all my clients, then I have a second CCR 002 which is for my internal equipments use i.e graphs, mails, web etc. I have setup Ubuntu BIND DNS caching and forwarding, I want all my customers on CCR 001 to use the DNS Server behind the CCR 002.
Once everything is setup, it only works within my 002 Network! From outside port 53 shows closed (http://www.yougetsignal.com/tools/open-ports/)
Please assist, below is my:
chain=dstnat action=dst-nat to-addresses=PRIVATE IP protocol=udp
dst-address=PUBLIC IP dst-port=53 log=yes log-prefix=""