ESX Time



The host servers must have the ntpd service configured so they sync time with our network time authority. If not, they will 'drift' and guests that utilize kerberus will fail. The steps are to:
  • Edit some files
  • Open the firewall
  • Enable the service
  • Start the service and check for erros


Edit the following configuration files

  • /etc/ntp.conf
  • /etc/ntp/step-tickers
  • /etc/hosts
  • In the service section, add the lines
    • 'server'
    • 'restrict'
Note: on older systems, you must use the IP Address
  • Below that comment out any other lines that start with 'server'
  • add the line ''
  • add an entry for the host if you want save time in dns lookups (not necessary for ntpd to work)

Open the firewall

# esxcfg-firewall --enableService ntpClient

Configure the service to start when rebooted

chkconfig --level 345 ntpd on

Start ntpd and check for errors

service ntpd restart tail /var/log/messages




Refer to Doc ID: 1339 for info on the specific files