The port, IP, and DNS settings are configured during the installation of Update Manager and do not depend on your deployment model.

Default Network Ports

The network port settings are configured during installation but you can change them later to avoid conflicts with other programs installed on the same machine.

Table 1. Update Manager Default Network Ports

TCP Port Number

Description

80

The port used by Update Manager to connect to vCenter Server.

9084

The port used by ESX/ESXi hosts to access host patch downloads over HTTP.

902

The port used by Update Manager to push host upgrade files.

8084

The port used by Update Manager client plug-in to connect to the Update Manager SOAP server.

9087

The HTTPS port used by Update Manager Client plug-in to upload host upgrade files.

IP Address and DNS Name

The Update Manager network settings include the IP address or DNS name that the update utility on hosts uses to retrieve the patch metadata and binaries from the Update Manager server (through HTTP). The IP address is configured during installation, but you can change it later from the IP address or host name for the patch store drop-down menu on the Network Connectivity page of the Configuration tab.

Important:

To avoid any potential DNS resolution problems, use an IP address whenever possible. If you must use a DNS name instead of an IP address, ensure that the DNS name you specify can be resolved from all hosts managed by Update Manager as well as by vCenter Server.

Update Manager supports Internet Protocol version 6 (IPv6) environments for scanning and remediating hosts running ESX/ESXi 4.0 and later. Update Manager does not support IPv6 for scanning and remediation of virtual machines and virtual appliances.

If you have ESX 3.x hosts in your inventory and Update Manager is installed on a computer with IPv6, the scan and remediation operations on the hosts fail, because the hosts cannot connect to the Update Manager server. To be able to scan and remediate ESX 3.x hosts, you should install Update Manager on a computer with IPv4 enabled.

vCenter Server, Update Manager, and your ESX/ESXi hosts might exist in a heterogeneous IPv6 and IPv4 network environment. In such an environment, if you use IP addresses, and no dual stack IPv4 or IPv6 DNS servers exist, the ESX/ESXi hosts configured to use only IPv4 address cannot access the IPv6 network resources. The hosts configured to use only IPv6 cannot access the IPv4 network resources either.

You can install Update Manager on a machine on which both IPv4 and IPv6 are enabled. During host operations such as scanning, staging, and remediation, Update Manager provides the address of its patch store location to the ESX/ESXi hosts. If Update Manager is configured to use an IP address, it provides an IP address of either IPv4 or IPv6 type, and can be accessed only by some of the hosts. For example, if Update Manager provides an IPv4 address, the hosts that use only an IPv6 address cannot access the Update Manager patch store. In such a case, consider the following configuration.

Table 2. Update Manager Configuration

Host IP Version

Action

IPv4

Configure Update Manager to use either an IPv4 address or a host name. Using a host name lets all hosts rely on the DNS server to resolve to an IPv4 address.

IPv6

Configure Update Manager to use either an IPv6 address or a host name. Using a host name lets hosts rely on the DNS server to resolve to an IPv6 address.

IPv4 and IPv6

Configure Update Manager to use either IPv4 or IPv6.