WE HAVE 1 DREAM LIKE SERVER (STATIC IP) +ROUTER PORT 678
CARD SHARING
OTHER 5 USERS HAVE DREAMBOX NOT STATIC IP
WE LIKE ONLY FRIENDS ACESS IN SERVER DREAMBOX
WE NEED HELP HOWE TO BLOCK OTHERS USERS TO ACSS THE DREAMBOX.

SOME FIREWALL OR OTHER SOLUTION ONLY FRIENS ACESS OTHER WE LIKE BLOCK