AWS ALB with multiple certificates on same port(443)

• outline

You can use AWS ALB with multiple certificates on same the HTTPS port 443.

• requirement

AWS ACM with multiple certificates

AWS Route53

AWS ALB

• how-to

ACM

• add certificate <foo.com, *.foo.com, bar.com, *.bar.com>

ALB

• Listener

  • HTTP redirect to HTTPS 443

  • HTTPS(443) >>>> Certificates, add multiple certificates

• Host Based Routing

  • is host <foo.com> THEN A Target group

  • is host <bar.com> THEN A Target group

Route53

• register foo.com to ALB

• register bar.com to ALB

• reference

https://aws.amazon.com/blogs/aws/new-application-load-balancer-sni/