一台服务器，两个域名
首先购买https，获取到CA证书，两个域名就得到两套证书
第二步：现在就是Nginx和OpenSSL的安装与配置(这里注意，一般情况下一个IP只支持一个SSL证书，那么我们现在要在一个IP上实现多个SSL证书，就必须让Nginx支持TLS SNI，由于默认的OpenSSL是没有打开TLS SNI的)
1）Nginx支持多域名SSL证书是需要OpenSSL库支持的，CentOS5.X的OpenSSL库本身不支持这种特性，需要重新下载编译，步骤如下：
wget https://www.openssl.org/source/old/0.9.x/openssl-0.9.8zh.tar.gz
tar zxvf ./openssl-0.9.8zh.tar.gz
2）下载Nginx，进行配置
wget http://nginx.org/download/nginx-1.8.0.tar.gz
tar zxf nginx-1.8.0.tar.gz
cd nginx-1.8.0
./configure --prefix=/usr/local/nginx1.8.0 --user=www --group=www --with-http_stub_status_module --with-http_ssl_module --with-http_gzip_static_module --with-openssl=../openssl-0.9.8zh
（此处会报错：出现pcre库没找到或zlib没找到，
在CentOS下可以使用 yum -y install pcre-devel zlib-devel 进行安装缺失的组件
）
make && make install
3）检查Nginx状态
/usr/local/nginx1.8.0/sbin/nginx -V
得到如下结果就说明配置好了：
nginx version: nginx/1.8.0
built by gcc 4.1.2 20080704 (Red Hat 4.1.2-55)
built with OpenSSL 0.9.8zh 3 Dec 2015
TLS SNI support enabled #可以看到TLS SNI support打开了
configure arguments: --prefix=/usr/local/nginx1.8.0 --user=www --group=www --with-http_stub_status_module --with-http_ssl_module --with-http_gzip_static_module --with-openssl=../openssl-0.9.8zh
第三步：
配置Nginx 应用服务器
证书放置到 Nginx/conf/cert 目录下
nginx.conf文件如下
http { ???include ??????mime.types; ???default_type ?application/octet-stream; ???#log_format ?main ?‘$remote_addr - $remote_user [$time_local] "$request" ‘ ???# ?????????????????‘$status $body_bytes_sent "$http_referer" ‘ ???# ?????????????????‘"$http_user_agent" "$http_x_forwarded_for"‘; ???#access_log ?logs/access.log ?main; ???sendfile ???????on; ???#tcp_nopush ????on; ???#keepalive_timeout ?0; ???keepalive_timeout ?65; ???#gzip ?on; ???upstream shop_wechat {server 127.0.0.1:80; ???} ???server { ???????listen ??????443 ssl; ???????server_name ?www.test1.com; ???????ssl_certificate ?????cert/214257281110004.pem; ???????ssl_certificate_key ?cert/214257281110004.key; ???????ssl_session_timeout 5m; ???????ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4; ???????ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ???????ssl_prefer_server_ciphers on; ???????location / { ???????????proxy_pass http://shop_wechat; ???????} ???} ???upstream shop_app {server 127.0.0.1:1098; ???} ???server { ???????listen ??????443 ssl; ???????server_name ?app.test2.com; ???????ssl_certificate ?????cert/214257663690004.pem; ???????ssl_certificate_key ?cert/214257663690004.key; ???????ssl_session_timeout 5m; ???????ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4; ???????ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ???????ssl_prefer_server_ciphers on; ???????location / { ???????????proxy_pass http://shop_app; ???????} ???}}
最后：访问下试试看 ：https://www.test1.com
一个ip对应多个域名多个ssl证书配置-Nginx实现多域名证书HTTPS
原文地址：http://www.cnblogs.com/beyang/p/7718463.html