[CODE4LIB] Amazon EC2 ports: only 80 and 8080?

[Han, Yan]

Hello,
Currently we would like to have Amazon EC2 node hosting 2 applications: DSpace 
and Koha (so that we need 4 ports). However, it seems to me that only port 80 
and 8080 are available. Any other ports are not accessible from outside.
Anyone has similar experience and knows how to open other ports?
Thanks,
Yan