ALB Integration with AWS PCA Priavte Certificate

Question

Hello

I am currently facing an issue where I am unable to assign a private certificate, issued from AWS Private Certificate Authority (PCA), to an Application Load Balancer (ALB).

I have already completed the following steps:

Created a private CA using AWS Certificate Manager Private CA.

Issued a private certificate using that CA.

Confirmed that the certificate is in Issued status and available in ACM in the same region as the ALB.

Verified that the ALB is configured for HTTPS (listener on port 443).

Despite this, the private certificate does not appear as an option when I try to assign it to the ALB listener. I would like to understand if I am missing a required step or if there are any additional permissions, trust configurations, or limitations I should be aware of.

Could you please help me troubleshoot this issue or guide me through the correct process?

Thank you in advance for your support.

Best regards,
Rohit

Riku_Kobayashi · Accepted Answer

Hello.

I tried it on my AWS account and confirmed that I could select a certificate issued by a private CA in ALB.  
This may be different from the screen you are seeing, but when creating an ALB, you can select a certificate issued by a private CA in the "Secure listener settings" field.  
I recommend that you refresh the screen and double-check that the region in which the certificate was issued is correct.

rohitd · Answer

ALB with AWS PCA Integartion is not possible directly but we can do like this 
1.Genarate the CSR and SIgn by the AWS PCA and create the certificate and upload to the ACM.
2.Once Certificate get uploaded then using ACM ARN with Load Balancer we can attached the Certifiacate isssued by the AWS PCA

rohitd · Answer

In my screen I can see only three option to attached the certificate to the Load balancer
1.USING ACM
2.USING IAM
3.Import Certificate
Not option is from the AWS PCA

ALB Integration with AWS PCA Priavte Certificate

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