I think in this particular situation you require to do port forwarding on the router of yours. you will require to do following steps.
You have to go for NAT/PAT settings which is located at the advanced section of router interface.
Now you should add new rule and you have to go for Create new rule option and you should put the above mentioned numbers into the external as well as internal ports. You should select protocol as TCP or UDP.
TCP: From 27014 to 27050
UDP: From 27000 to 27030