diff --git a/install/tpl/nginx_ispconfig.vhost.master b/install/tpl/nginx_ispconfig.vhost.master
index c426e9d0faf4065153d763da703b638f3e7eba70..3c8bf5dbaf749f4fca8ba08a44fa8ebe4404a8d3 100644
--- a/install/tpl/nginx_ispconfig.vhost.master
+++ b/install/tpl/nginx_ispconfig.vhost.master
@@ -5,6 +5,8 @@ server {
 		{ssl_comment}ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
         {ssl_comment}ssl_certificate /usr/local/ispconfig/interface/ssl/ispserver.crt;
         {ssl_comment}ssl_certificate_key /usr/local/ispconfig/interface/ssl/ispserver.key;
+        {ssl_comment}ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS';
+        {ssl_comment}ssl_prefer_server_ciphers on;
 		
 		# redirect to https if accessed with http
 		{ssl_comment}error_page 497 https://$host:{vhost_port}$request_uri;
diff --git a/server/conf/nginx_vhost.conf.master b/server/conf/nginx_vhost.conf.master
index e2fd17bf06c0695c56825ab40cee808de2f74351..1303f0b8cc3c9b87b5f7ddf3471bc1bf41ceea2d 100644
--- a/server/conf/nginx_vhost.conf.master
+++ b/server/conf/nginx_vhost.conf.master
@@ -7,7 +7,8 @@ server {
 <tmpl_if name='ssl_enabled'>
         listen <tmpl_var name='ip_address'>:<tmpl_var name='https_port'> ssl{tmpl_if name='enable_http2' op='==' value='y'} http2{/tmpl_if}{tmpl_if name='enable_spdy' op='==' value='y'} spdy{/tmpl_if};
 		ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
-		ssl_ciphers EECDH+AESGCM:EDH+AESGCM:EECDH:EDH:!MD5:!RC4:!LOW:!MEDIUM:!CAMELLIA:!ECDSA:!DES:!DSS:!3DES:!NULL;
+		# ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS';
+		# ssl_prefer_server_ciphers on;
 <tmpl_if name='ipv6_enabled'>
         listen [<tmpl_var name='ipv6_address'>]:<tmpl_var name='https_port'> ssl{tmpl_if name='enable_http2' op='==' value='y'} http2{/tmpl_if}{tmpl_if name='enable_spdy' op='==' value='y'} spdy{/tmpl_if};
 </tmpl_if>
diff --git a/server/conf/vhost.conf.master b/server/conf/vhost.conf.master
index ed591c9e456df9cde774b3f1829be6bf471ad3d2..541133fc0d4cb617649bdef4148ca82fb73b6baa 100644
--- a/server/conf/vhost.conf.master
+++ b/server/conf/vhost.conf.master
@@ -55,7 +55,7 @@
 <tmpl_if name='ssl_enabled'>
 		SSLEngine on
 		SSLProtocol All -SSLv2 -SSLv3
-		SSLCipherSuite          ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384: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:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
+		# SSLCipherSuite          ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
 		SSLHonorCipherOrder     on
 		# <IfModule mod_headers.c>
 		# Header always add Strict-Transport-Security "max-age=15768000"