Hello @Cibin Albin ,
Thank you for reaching out t Microsoft QnA Platform. Happy to answer your question.
You mentioned that your custom Redhat image is unable fetch content from Redhat hosted repositories.
Looking at the error, it looks like a timeout, which indicates a network issue. I am assuming it is a PAYG image, because if it was a BYOS trying to talk tot he RHUI mirrors, you would be getting an SSL client error or another valid HTTP response code.
You should check for routing issues accessing the RHUI IPs.
Links to refer: redhat-rhui
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