Verification of proxied HTTPS server certificate

[Maxim Dounin]

Hello!

On Tue, Sep 24, 2019 at 06:35:10AM -0400, shivramg94 wrote:

> According to the documentation
> (http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_ssl_verify)
> the directive "proxy_ssl_verify" is used to enable or disabled the
> verification of the proxied HTTPS server certificate. But it doesn't talk
> about what all different types of validations (like Host Name Verification,
> Certificate Expiry etc) it does. 
> 
> Could someone list out the validations Nginx performs on the obtained server
> certificate from the upstream server when the above said directive is set to
> "on"?

It verifies that the certificate is valid, signed by a trusted CA, 
and matches the host name as used in the proxy_pass directive.  
Much like it normally happens with any HTTPS client as per RFC 
2818.

-- 
Maxim Dounin
http://mdounin.ru/