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diff --git a/content/notes/aws-solutions-architect/14.ssl-tls.md b/content/notes/aws-solutions-architect/14.ssl-tls.md new file mode 100644 index 0000000..033f662 --- /dev/null +++ b/content/notes/aws-solutions-architect/14.ssl-tls.md @@ -0,0 +1,38 @@ +--- +title: 14 - ssl tls +course: ["aws solutions architect"] +--- + +## SSL / TLS Basics + +SSL refers to Secure Socket Layer and is a way to encrypt network traffic that is in flight. + +For AWS it refers to encrypting traffic between the client and the load balancer. Traffic between the load balancer and instances are handled over plain HTTP. + +The S in HTTPS refers to 'secure', which means the traffic is using SSL. + +Nowadays, traffic is encrypted using TLS (Transport Layer Security), which is a newer version of SSL, but people still refer to it as SSL. + +SSl certs are issued by a Certificate Authority (CA) and have an expiration date. + + + +## Load Balancer and SSL + +- LB uses an X.509 Certificate +- ACM (AWS Certificate Manager) manages certs +- You must set a default SSL cert +- Clients can use SNI (Server Name Indication) to specify the hostname they reach + +## Server Name Indication (SNI) + +- This helps manage multiple SSLs on one Server +- Client must indicate server hostname to get the right SSL + + + +## Load Balancer Support + +- _CLB_: supports 1 SSL +- _ALB_: supports multiple with SNI +- _NLB_: support multiple with SNI |