Server address lists and host names
The internet-facing HMC or SSL Proxy requires outbound TCP/IP connections to be allowed to esupport.ibm.com port 443. When possible, use this hostname when you configure firewall and proxy rules. If needed, use the following IP addresses:
Attention: It is important that the customer configures the following addresses during
the planning phase to properly prepare the customer's network. The customer’s network is required to
allow connectivity to both current and new IP addresses listed in the tables
below.