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<response-header header-name="Access-Control-Allow-Origin" header-value="https://www.minhaempresa.com.br" name="Access-Control-Allow-Origin"/>

<response-header header-name="Access-Control-Allow-Origin" header-value="*" name="Access-Control-Allow-Origin"/>

<response-header header-name="Access-Control-Allow-Origin" header-value="https://www.outrosite.com.br" name="Access-Control-Allow-Origin"/>

Nesse caso, é necessário também REMOVER as seguintes linhas do arquivo [diretório_instalação]/appserver/domain/configuration/domain.xml:

<filter-ref name="Access-Control-Allow-Origin"/>
<filter-ref name="Access-Control-Allow-Methods"/>
<filter-ref name="Access-Control-Allow-Headers"/>
<filter-ref name="Access-Control-Allow-Credentials"/>

<response-header header-name="Access-Control-Allow-Origin" name="Access-Control-Allow-Origin" header-value="*" />
<response-header name="Access-Control-Allow-Methods" header-name="Access-Control-Allow-Methods" header-value="GET, POST, OPTIONS, PUT"/>
<response-header name="Access-Control-Allow-Headers" header-name="Access-Control-Allow-Headers" header-value="accept, authorization, content-type, x-requested-with"/>
<response-header name="Access-Control-Allow-Credentials" header-name="Access-Control-Allow-Credentials" header-value="true"/>
<response-header name="Access-Control-Max-Age" header-name="Access-Control-Max-Age" header-value="1"/>

upstream fluig-http {
    server 192.168.2.100:8080;
}

server {
    listen                    443 ssl;
    server_name               *.minhaempresa.com;
    server_tokens             off;
    ssl_certificate           fullchain.pem;
    ssl_certificate_key       privkey.pem;
	ssl_protocols             TLSv1.2 TLSv1.3;
	ssl_ciphers               ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK; # Se necessário complemente com outras chaves Ciphers suportadas;
	ssl_prefer_server_ciphers on;
	ssl_session_cache         shared:SSL:10m;

    location / {
        set $CORS "";
        # Lista de origens permitidas
        if ($http_origin ~* "^https://(www.minhaempresa.com|empresa1.com|api.empresa2.com)$") {
            set $CORS "O";
        }
        if ($request_method = 'OPTIONS') {
            set $CORS "${CORS}O";
        }

        if ($CORS = "OO") {
            add_header Access-Control-Allow-Origin $http_origin;
            add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS, PUT';
            add_header Access-Control-Allow-Headers 'Accept,Authorization,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
            add_header Access-Control-Allow-Credentials 'true';
            add_header Access-Control-Max-Age 3600;
            add_header Content-Type 'text/plain charset=UTF-8';
            add_header Content-Length 0;

            return 204;
        }

        if ($CORS = "O") {
            add_header Access-Control-Allow-Origin $http_origin;
            add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS, PUT';
            add_header Access-Control-Allow-Headers 'Accept,Authorization,Content-Type,X-Requested-With,User-Agent,If-Modified-Since,Cache-Control';
            add_header Access-Control-Allow-Credentials 'true';
            add_header Access-Control-Max-Age 3600;
        }

        proxy_pass http://fluig-http;
        proxy_ssl_verify    off;
        proxy_ssl_ciphers   HIGH:!aNULL:!MD5;

        proxy_set_header X-Forwarded-Host $host:443;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header X-Real-IP $remote_addr;
		
        client_max_body_size       880m;
        client_body_buffer_size    256k;

        proxy_connect_timeout      800;
        proxy_send_timeout         800;
        proxy_read_timeout         800;

        proxy_buffer_size          8k;
        proxy_buffers              8 32k;
        proxy_busy_buffers_size    64k;
        proxy_temp_file_write_size 64k;
    }
}

Recomendamos o uso de chaves mais modernas e seguras como os indicados no exemplo. Porém, outras chaves também são suportadas:

DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA

Preencha a diretiva ssl_ciphers do fluig.conf substituindo pelos valores suportados acima que estejam de acordo com sua política de segurança. As chaves podem ser validadas em https://ciphersuite.info/.

SetEnvIf Origin "http(s)?://(www.minhaempresa.com|empresa1.com.br" />|api.empresa2.com)$" AccessControlAllowOrigin=$0
Header add Access-Control-Allow-Origin %{AccessControlAllowOrigin}e env=AccessControlAllowOrigin

Header set Access-Control-Allow-Headers: "Accept,Authorization,DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type"
Header set Access-Control-Allow-Methods: "GET, PUT, POST, OPTIONS, DELETE"
Header Set Access-Control-Request-Method: "GET, PUT, POST, OPTIONS, DELETE"
Header Set Access-Control-Allow-Credentials: "true"
Header Set Access-Control-Max-Age "3600"

<VirtualHost *:80>
    RewriteEngine On
    RewriteCond %{HTTPS} off
    RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
</VirtualHost>

<VirtualHost *:443>
    ServerName minhaempresa.com
    RequestHeader set X-Forwarded-Host 192.168.2.100:443
    RequestHeader set X-Forwarded-Proto https
    SSLProxyEngine On
    SSLEngine On
    SSLCertificateFile "conf/cert1.pem"
    SSLCertificateKeyFile "conf/privkey1.pem"
    SSLCertificateChainFile "conf/fullchain1.pem"
    ProxyPreserveHost On
    ProxyPass / http://192.168.2.100:8080/
    ProxyPassReverse / https://minhaempresa.com/
</VirtualHost>
  
<VirtualHost *:21>
    ServerName minhaempresa.com
    ProxyPreserveHost On
    ProxyPass / ftp://192.168.2.100/
    ProxyPassReverse / ftp://192.168.2.100:21/
</VirtualHost>