as BartoszP suggested, your solution is srcnat. A little Googling goes long way.
http://forum.mikrotik.com/t/access-to-wan-ip-from-lan/93234/1
and
http://forum.mikrotik.com/t/cant-reach-public-ip-from-lan/41298/1
as BartoszP suggested, your solution is srcnat. A little Googling goes long way.
http://forum.mikrotik.com/t/access-to-wan-ip-from-lan/93234/1
and
http://forum.mikrotik.com/t/cant-reach-public-ip-from-lan/41298/1