These ports are mandatory:
- 22 - SSH (TCP)
- 53 - DNS (TCP and UDP)
- 80 - HTTP (TCP/UDP)
- 902 - vCenter Server / VMware Infrastructure Client - UDP for ESX/ESXi Heartbeat (UDP and TCP)
- 903 - Remote Console (UDP)
- 443 - Web Access (TCP)
- 27000, 27010 - License Server (Valid for ESX/ESXi 3.x hosts only)
These ports are optional:
- 123 - NTP (UDP)
- 161, 162 - SNMP (UDP)
- 88 - Kerberos (UDP and TCP)
- 464 - Active Directory (TCP and UDP)
- 3260 - Software iSCSI (TCP)
For a complete list of ports, see TCP and UDP Ports for vCenter Server, ESX/ESXi hosts, and other network components management