CODEWITHSUNDEEP
amazon-web-servicessslcloudflare
never_odd_or_even
never_odd_or_even

Reputation: 314

Cloudflare With AWS ELB using AWS certs

I’m trying to configure Cloudflare to sit in front of my AWS application that uses AWS issued certificates with an AWS via an ELB.

Currently I’ve just point a cname in clouflare to my ELB that uses an AWS cert to serve my application securly, but I’m gettign an error “ERR_SSL_VERSION_OR_CIPHER_MISMATCH”.

I haven’t uploaded any certs to cloudflare as I can’t export AWS issued certs. I also haven’t generated any certs via cloudflare.

Do certificates on cloudfare need to match certs on AWS? Can I use a gerenated cert on cloudflare with my AWS cert? Should I get new certs from a 3rd party and use them in both Cloudflare and AWS?

Upvotes: 1

Views: 1961

Answers (2)

Allan Joseph
Allan Joseph

Reputation: 145

If you want to configure Cloudflare, it is best to use LetsEncrypt SSL Certificates. You would not need an ELB to implement SSL on the server which would help you in reducing costs.

You can visit https://certbot.eff.org/ and Select your server software and OS of your instance and it will show you the steps.

Also, Keep Full SSL in Cloudflare Settings under Crypto, "Full (Strict)" would probably not work

Upvotes: 0

BryceH
BryceH

Reputation: 2798

You need to acquire certs for CloudFlare since it breaks the protocol and inspects your communication and fronts your site. It isn't a pass through like you would see with a TCP load balancer.

The AWS certs on your ELB should be ok to leave in place.

Upvotes: 2

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