Cannot Connect to Oracle Database running on Windows 8 Hyper V Virtual Machine

Question

I have oracle server (standard edition) installed on a guest VM (Windows 8 Hyper V). I have mapped a host entry to the VM as "brettvm". I am able to log into the VM and connect to the default instance using sqlplus. So far so good.

EDIT: Here's the listner.ora file on the server. I'm starting to suspect the trouble may lie here:

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = c:\oracle

The tnsnames.ora file on the server looks like this:

LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))


ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

The Problem: When I attempt to connect from the HOST machine, sqlplus prompts for a password and then hangs. Here is my tnsnames.ora on the host machine:

orcl.brettvm =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = brettvm)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

Some things I have tried:

• Verifed that "brettvm" is in my hosts (pingable and browseable)
• Verified connectivity between the host and VM over port 80 (browser / telnet)
• Verified connectivity between the host and vm over port 1521 (telnet). Note that I opened this port up on the VM through windows firewall.
• Verified the database is up and running via sqlplus on the host (see above).
• Turned off windows firewall on the VM

I'm going to start digging through the installation guide...

Any other advice? Thanks.