Oracle 10g listener issue on FC3

[fedcore3 at alias.hotpop.com]

Hi all. Running into a bit of an issue with Oracle 10g.

Installed without issues, and can access the database locally.

Getting the listener to work hasn't succeeded:

LSNRCTL for Linux: Version 10.1.0.3.0 - Production on 26-DEC-2004 15:08:10

Copyright (c) 1991, 2004, Oracle.  All rights reserved.

Starting /usr/oracle/product/10.1.0/Db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.1.0.3.0 - Production
System parameter file is
/usr/oracle/product/10.1.0/Db_1/network/admin/listener.ora
Log messages written to
/usr/oracle/product/10.1.0/Db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=C5600i)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
TNS-12547: TNS:lost contact
 TNS-12560: TNS:protocol adapter error
  TNS-00517: Lost contact
   Linux Error: 104: Connection reset by peer
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=C5600i)(PORT=1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 111: Connection refused

I have SELinux disabled, no firewall on the server (IPTables or other)

Not sure where to look next. Tried changing the HOST to the machine name,
with and without domain name, IP address, no luck.

Any ideas?

A. Contreras