diff --git a/src/zammad/install-service.sh b/src/zammad/install-service.sh
index b738102..de918b5 100644
--- a/src/zammad/install-service.sh
+++ b/src/zammad/install-service.sh
@@ -28,120 +28,20 @@ cat << EOF >>/etc/elasticsearch/jvm.options.d/msmx-size.options
 -Xmx1g
 EOF
 
-# configurwe nginx
-rm -f /etc/nginx/sites-enabled/default
+# configure nginx
+unlink /etc/nginx/sites-enabled/default
+sed -e "s|server_name example.com;|server_name ${LXC_HOSTNAME}.${LXC_DOMAIN};|g" \
+ -e "s|ssl_certificate /etc/nginx/ssl/example.com-fullchain.pem;|ssl_certificate /etc/nginx/ssl/fullchain.pem;|g" \
+ -e "s|ssl_certificate_key /etc/nginx/ssl/example.com-privkey.pem;|ssl_certificate_key /etc/nginx/ssl/privkey.pem;|g" \
+ -e "s|ssl_protocols TLSv1.2;|ssl_protocols TLSv1.2 TLSv1.3;|g" \
+ -e "s|ssl_trusted_certificate /etc/nginx/ssl/lets-encrypt-x3-cross-signed.pem;|#  ssl_trusted_certificate /etc/nginx/ssl/lets-encrypt-x3-cross-signed.pem;|g" \
+ /opt/zammad/contrib/nginx/zammad_ssl.conf > /etc/nginx/sites-available/zammad_ssl.conf
 
-cat << EOF > /etc/nginx/sites-available/zammad.conf
-upstream zammad-railsserver {
-  server 127.0.0.1:3000;
-}
-
-upstream zammad-websocket {
-  server 127.0.0.1:6042;
-}
-
-server {
-    listen 80;
-    listen [::]:80;
-    server_name ${LXC_HOSTNAME}.${LXC_DOMAIN};
-    
-    server_tokens off;
-
-    access_log /var/log/nginx/zammad.access.log;
-    error_log /var/log/nginx/zammad.error.log;
-
-    location /.well-known/ {
-        root /var/www/html;
-    }
-
-    return 301 https://\$host\$request_uri;
-}
-server {
-    listen 443 ssl http2;
-    listen [::]:443 ssl http2;
-
-    server_name ${LXC_HOSTNAME}.${LXC_DOMAIN};
-    
-    server_tokens off;
-    ssl_certificate /etc/ssl/certs/ssl-cert-snakeoil.pem;
-    ssl_certificate_key /etc/ssl/private/ssl-cert-snakeoil.key;
-
-    ssl_protocols TLSv1.3 TLSv1.2;
-    ssl_ciphers ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:EECDH+AESGCM:EDH+AESGCM;
-    ssl_dhparam /etc/nginx/dhparam.pem;
-    ssl_prefer_server_ciphers on;
-    ssl_session_cache shared:SSL:10m;
-    ssl_session_timeout 180m;
-
-    ssl_stapling on;
-    ssl_stapling_verify on;
-
-    resolver 1.1.1.1 1.0.0.1;
-#
-#  https://webdock.io/en/docs/how-guides/security-guides/how-to-configure-security-headers-in-nginx-and-apache
-#
-    add_header Strict-Transport-Security 'max-age=31536000; includeSubDomains; preload';
-    add_header Content-Security-Policy "default-src 'self'; font-src *;img-src * data:; script-src *; style-src *";
-    add_header Referrer-Policy "strict-origin";
-    add_header X-Frame-Options DENY;
-    add_header X-Content-Type-Options nosniff;
-    add_header X-XSS-Protection "1; mode=block";
-    add_header Permissions-Policy "geolocation=(),midi=(),sync-xhr=(),microphone=(),camera=(),magnetometer=(),gyroscope=(),fullscreen=(self),payment=()";
-    add_header Strict-Transport-Security "max-age=31536000" always;
-
-    location = /robots.txt  {
-    access_log off; log_not_found off;
-    }
-
-    location = /favicon.ico {
-    access_log off; log_not_found off;
-    }
-
-    root /opt/zammad/public;
-
-    access_log /var/log/nginx/zammad.access.log;
-    error_log  /var/log/nginx/zammad.error.log;
-
-    client_max_body_size 50M;
-
-    location ~ ^/(assets/|robots.txt|humans.txt|favicon.ico|apple-touch-icon.png) {
-    expires max;
-    }
-
-    location /ws {
-    proxy_http_version 1.1;
-    proxy_set_header Upgrade \$http_upgrade;
-    proxy_set_header Connection "Upgrade";
-    proxy_set_header CLIENT_IP \$remote_addr;
-    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
-    proxy_set_header X-Forwarded-Proto	\$scheme;
-    proxy_read_timeout 86400;
-    proxy_pass http://zammad-websocket;
-    }
-
-    location / {
-    proxy_set_header Host \$http_host;
-    proxy_set_header CLIENT_IP \$remote_addr;
-    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
-    proxy_set_header X-Forwarded-Proto	\$scheme;
-
-    # change this line in an SSO setup
-    proxy_set_header X-Forwarded-User "";
-
-    proxy_read_timeout 180;
-    proxy_pass http://zammad-railsserver;
-
-    gzip on;
-    gzip_types text/plain text/xml text/css image/svg+xml application/javascript application/x-javascript application/json application/xml;
-    gzip_proxied any;
-    }
-}
-EOF
-
-ln -sf /etc/nginx/sites-available/zammad.conf /etc/nginx/sites-enabled/
+ln -sf /etc/nginx/sites-available/zammad_ssl.conf /etc/nginx/sites-enabled/
 
 generate_dhparam
 
+# configure elasticsearch
 /usr/share/elasticsearch/bin/elasticsearch-plugin install -b ingest-attachment
 
 systemctl enable elasticsearch.service