Issue with SNI/SSL and default_server

[Igor Sysoev]

On Aug 28, 2012, at 8:33 , bompus wrote:

> I've had the same issues and did some testing.
> 
> The following causes the issue where the SSL certificate that is defined in
> the default_server block is being sent for requests that end up in another
> server block that has a different ssl_certificate defined. This only happens
> when adding the IP address as server_name.
> 
> Example of issue:
> server {
>   listen 443 default_server ssl;
>   server_name _;
>   ssl_certificate      /usr/local/nginx/conf/ssl/default.crt;
>   ssl_certificate_key  /usr/local/nginx/conf/ssl/default.key;
>   location / { return 403; }
> }
> 
> server {
> 	listen 443 ssl;
> 	server_name 1.2.3.4;
>        ssl_certificate      /usr/local/nginx/conf/ssl/1.2.3.4.crt;
>        ssl_certificate_key  /usr/local/nginx/conf/ssl/1.2.3.4.key;
> 	location /test { return 401;}
> }
> 
> When I access https://1.2.3.4/test , I receive a 401 error as expected, but
> the SSL certificate being sent is the one defined in default.crt
> 
> Working:
> <Same default server block>
> 
> server {
> 	listen 443 ssl;
> 	server_name test.hostname.com;
>        ssl_certificate      /usr/local/nginx/conf/ssl/1.2.3.4.crt;
>        ssl_certificate_key  /usr/local/nginx/conf/ssl/1.2.3.4.key;
> 	location /test { return 401;}
> }
> 
> Now when accessing test.hostname.com which is an A record to 1.2.3.4 , I get
> served the correct certificate as defined in 1.2.3.4 -- I've tested this
> multiple times on Ubuntu 12.04 w/ nginx as configured:
> nginx version: nginx/1.2.3
> built by gcc 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
> TLS SNI support enabled
> configure arguments: --with-http_ssl_module --user=nobody --group=nobody

What client do you use to test ?
It may not send a hostname in SSL hello request if the hostname is IP address.


--
Igor Sysoev