[Judging height?]

Is there an easy way to see the various levels of elevation on map? Ive always found it difficult to tell where the little dips in the terrain are and sometimes this really messes me up.

[Melee Combat]

Does CMBB incorporate melee combat? ive heard it does but my troops always seem to use their guns even 1M away. Is there some way u can specifically tell troops to assult a position and use melee type weapons.

[Ports]

What ports does this game use? I want to play a TCP/IP game with a friend but i have a router so i need to know which ports to open.