With vSphere Replication 9.0.1 and later you can configure an HTTP proxy for the Update Repository.
Prerequisites
Verify that you are using vSphere Replication 9.0.1 or later.
Procedure
Results
When performing an upgrade, you will see the following logs in the
drconfig.log file.
Option '/UpdateRepositoryProxy/host' using value 'proxy.vmware.com' Option '/UpdateRepositoryProxy/port' using value '3128' Attempting connection; <resolver p:0x00007f9554003c70, 'proxy.vmware.com:3128', next:<TCP 'XX.XXXX.XX.XX : 3128'>>, last e: 0(Success)