Enable syslog for VMWare ESX3

# vi /etc/syslog.conf

add *.* @IPaddress_of_syslog_server

# esxcfg-firewall -o 514,udp,out,syslog
# service syslog restart
Shutting down kernel logger: [ OK ]
Shutting down system logger: [ OK ]
Starting system logger: [ OK ]
Starting kernel logger: [ OK ]

Your syslog server should now be receiving the ESX3 server's syslog information.