To enable syslog on a ESX host you need to modify the /etc/syslog.conf by adding the record like this:
ftp.crit @[collector IP],
where ftp.crit and kern.*- type of errors.
For ESXi you should use VI client.
please refer our MP Operations guide (http://www.veeam.com/files/guide/nworks ... _guide.pdf
section "APPENDIX B. SYSLOG AND COS FILE SYSTEM USAGE MONITORING" for information how to enable syslog in nworks.
also refer syslog.conf manual to get list of possible errors.
With best regards,