If you need to allow vnc or something through your linux firewall then consider either using the tool provided in the interface or edit
“/etc/sysconfig/system-config-securitylevel”
# Configuration file for system-config-securitylevel
–enabled
–port=22:tcp
–port=137:udp
–port=138:udp
–port=139:tcp
–port=445:tcp
–port=443:tcp
–port=23:tcp
–port=5800:tcp
–port=5801:tcp
–port=5900:tcp
–port=5901:tcp
–port=5902:tcp
–port=5903:tcp
–port=5904:tcp
Other ports to consider
8080 for generic tomcat
4848 for Sun Admin port
hans said
good tutorial