Description of problem: AWS customer has deployed and run RHEL clients that only uses pure IPV6. Fetching updates from Upstream content sites failed with Connection timeout issues. KBase https://access.redhat.com/articles/4720861 listed only IPV4 addresses. Internally deployed RHUA shows it is listening to IPV6 over port 443 Version-Release number of selected component (if applicable): All How reproducible: always Steps to Reproduce: 1. On a RHEL8 client assigned only with IPV6, run "dnf update" Actual results: 2022-04-19T21:23:07+0000 DEBUG error: Curl error (28): Timeout was reached for https://rhui3.us-east-2.aws.ce.redhat.com/pulp/mirror/protected/rhui-client-config/rhel/server/8/x86_64/ha [Connection timed out after 8025618 milliseconds] (https://rhui3.us-east-2.aws.ce.redhat.com/pulp/mirror/protected/rhui-client-config/rhel/server/8/x86_64/ha). Expected results: RHEL8 client assigned only with IPV6 to be able to fetch updates. Additional info: "dnf update" or any automated update from AWS console succeeds if the client is assigned with IPV4 address