How to change OAS port to 80???

If you are on a UNIX system and you are changing the Listen port to a number less than 1024, perform these steps before you change the Oracle HTTP Server Listen port.

By default, Oracle HTTP Server runs as a non-root user (the user that installed Oracle Application Server). On UNIX systems, if you change the Oracle HTTP Server Listen port number to a value less than 1024, you must enable Oracle HTTP Server to run as root, as follows:



execute the below command as root

cd ORACLE_HOME/Apache/Apache/bin
chown root .apachectl
chmod 6750 .apachectl

change the value of port and Listen in httpd.conf to 80 and restart the OAS as Oracle user.

For more information refer to the below link.http://download.oracle.com/docs/cd/B32110_01/core.1013/b32196/ports.htm#CIHJEEJH