diff --git a/lass/1systems/prism.nix b/lass/1systems/prism.nix
index b9542bc8e..c83f198cb 100644
--- a/lass/1systems/prism.nix
+++ b/lass/1systems/prism.nix
@@ -3,8 +3,9 @@
 let
   ip = config.krebs.build.host.nets.internet.ip4.addr;
 
-  inherit (import ../../4lib { inherit lib pkgs; })
-    manageCerts;
+  inherit (import <stockholm/lass/2configs/websites/util.nix> {inherit lib pkgs;})
+    manageCerts
+  ;
 
 in {
   imports = [
diff --git a/lass/2configs/websites/domsen.nix b/lass/2configs/websites/domsen.nix
index 43f9b3924..35a391d1b 100644
--- a/lass/2configs/websites/domsen.nix
+++ b/lass/2configs/websites/domsen.nix
@@ -1,14 +1,10 @@
 { config, pkgs, lib, ... }:
 
 let
-  inherit (config.krebs.lib)
+  inherit (import <stockholm/krebs/4lib> { config = {}; inherit lib; })
     genid
-    readFile
     ;
-  inherit (import ../../4lib { inherit lib pkgs; })
-    manageCert
-    manageCerts
-    activateACME
+  inherit (import <stockholm/lass/2configs/websites/util.nix> {inherit lib pkgs;})
     ssl
     servePage
     serveOwncloud
diff --git a/lass/2configs/websites/fritz.nix b/lass/2configs/websites/fritz.nix
index b063504f0..487c4644e 100644
--- a/lass/2configs/websites/fritz.nix
+++ b/lass/2configs/websites/fritz.nix
@@ -1,12 +1,16 @@
 { config, pkgs, lib, ... }:
 
 let
-  inherit (import ../../4lib { inherit lib pkgs; })
-    manageCerts
-    activateACME
+  inherit (import <stockholm/krebs/4lib> { config = {}; inherit lib; })
+    genid
+    head
+    nameValuePair
+  ;
+  inherit (import <stockholm/lass/2configs/websites/util.nix> {inherit lib pkgs;})
     ssl
     servePage
-    serveWordpress;
+    serveWordpress
+  ;
 
 in {
   imports = [
diff --git a/lass/2configs/websites/util.nix b/lass/2configs/websites/util.nix
new file mode 100644
index 000000000..84a20c711
--- /dev/null
+++ b/lass/2configs/websites/util.nix
@@ -0,0 +1,228 @@
+{ lib, pkgs, ... }:
+
+with lib;
+
+rec {
+
+  manageCerts = domains:
+    let
+      domain = head domains;
+    in {
+      security.acme = {
+        certs."${domain}" = {
+          email = "lassulus@gmail.com";
+          webroot = "/var/lib/acme/challenges/${domain}";
+          plugins = [
+            "account_key.json"
+            "key.pem"
+            "fullchain.pem"
+          ];
+          group = "nginx";
+          allowKeysForGroup = true;
+          extraDomains = genAttrs domains (_: null);
+        };
+      };
+
+      krebs.nginx.servers."${domain}" = {
+        locations = [
+          (nameValuePair "/.well-known/acme-challenge" ''
+            root /var/lib/acme/challenges/${domain}/;
+          '')
+        ];
+      };
+    };
+
+  ssl = domains:
+    {
+      imports = [
+        ( manageCerts domains )
+        ( activateACME (head domains) )
+      ];
+    };
+
+  activateACME = domain:
+    {
+      krebs.nginx.servers.${domain} = {
+        ssl = {
+          enable = true;
+          certificate = "/var/lib/acme/${domain}/fullchain.pem";
+          certificate_key = "/var/lib/acme/${domain}/key.pem";
+        };
+      };
+    };
+
+  servePage = domains:
+    let
+      domain = head domains;
+    in {
+      krebs.nginx.servers.${domain} = {
+        server-names = domains;
+        locations = [
+          (nameValuePair "/" ''
+            root /srv/http/${domain};
+          '')
+        ];
+      };
+    };
+
+  serveOwncloud = domains:
+    let
+      domain = head domains;
+    in {
+      krebs.nginx.servers."${domain}" = {
+        server-names = domains;
+        extraConfig = ''
+          # Add headers to serve security related headers
+          add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
+          add_header X-Content-Type-Options nosniff;
+          add_header X-Frame-Options "SAMEORIGIN";
+          add_header X-XSS-Protection "1; mode=block";
+          add_header X-Robots-Tag none;
+
+          # Path to the root of your installation
+          root /srv/http/${domain}/;
+          # set max upload size
+          client_max_body_size 10G;
+          fastcgi_buffers 64 4K;
+
+          # Disable gzip to avoid the removal of the ETag header
+          gzip off;
+
+          # Uncomment if your server is build with the ngx_pagespeed module
+          # This module is currently not supported.
+          #pagespeed off;
+
+          index index.php;
+          error_page 403 /core/templates/403.php;
+          error_page 404 /core/templates/404.php;
+
+          rewrite ^/.well-known/carddav /remote.php/carddav/ permanent;
+          rewrite ^/.well-known/caldav /remote.php/caldav/ permanent;
+
+          # The following 2 rules are only needed for the user_webfinger app.
+          # Uncomment it if you're planning to use this app.
+          rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
+          rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
+        '';
+        locations = [
+          (nameValuePair "/robots.txt" ''
+            allow all;
+            log_not_found off;
+            access_log off;
+          '')
+          (nameValuePair "~ ^/(build|tests|config|lib|3rdparty|templates|data)/" ''
+            deny all;
+          '')
+
+          (nameValuePair "~ ^/(?:autotest|occ|issue|indie|db_|console)" ''
+            deny all;
+          '')
+
+          (nameValuePair "/" ''
+            rewrite ^/remote/(.*) /remote.php last;
+            rewrite ^(/core/doc/[^\/]+/)$ $1/index.html;
+            try_files $uri $uri/ =404;
+          '')
+
+          (nameValuePair "~ \.php(?:$|/)" ''
+            fastcgi_split_path_info ^(.+\.php)(/.+)$;
+            include ${pkgs.nginx}/conf/fastcgi_params;
+            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+            fastcgi_param PATH_INFO $fastcgi_path_info;
+            fastcgi_param HTTPS on;
+            fastcgi_param modHeadersAvailable true; #Avoid sending the security headers twice
+            fastcgi_pass unix:/srv/http/${domain}/phpfpm.pool;
+            fastcgi_intercept_errors on;
+          '')
+
+          # Adding the cache control header for js and css files
+          # Make sure it is BELOW the location ~ \.php(?:$|/) { block
+          (nameValuePair "~* \.(?:css|js)$" ''
+            add_header Cache-Control "public, max-age=7200";
+            # Add headers to serve security related headers
+            add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
+            add_header X-Content-Type-Options nosniff;
+            add_header X-Frame-Options "SAMEORIGIN";
+            add_header X-XSS-Protection "1; mode=block";
+            add_header X-Robots-Tag none;
+            # Optional: Don't log access to assets
+            access_log off;
+          '')
+
+          # Optional: Don't log access to other assets
+          (nameValuePair "~* \.(?:jpg|jpeg|gif|bmp|ico|png|swf)$" ''
+            access_log off;
+          '')
+        ];
+      };
+      services.phpfpm.poolConfigs."${domain}" = ''
+        listen = /srv/http/${domain}/phpfpm.pool
+        user = nginx
+        group = nginx
+        pm = dynamic
+        pm.max_children = 5
+        pm.start_servers = 2
+        pm.min_spare_servers = 1
+        pm.max_spare_servers = 3
+        listen.owner = nginx
+        listen.group = nginx
+        # errors to journal
+        php_admin_value[error_log] = 'stderr'
+        php_admin_flag[log_errors] = on
+        catch_workers_output = yes
+      '';
+    };
+
+  serveWordpress = domains:
+    let
+      domain = head domains;
+
+    in {
+      krebs.nginx.servers."${domain}" = {
+        server-names = domains;
+        extraConfig = ''
+          root /srv/http/${domain}/;
+          index index.php;
+          access_log /tmp/nginx_acc.log;
+          error_log /tmp/nginx_err.log;
+          error_page 404 /404.html;
+          error_page 500 502 503 504 /50x.html;
+        '';
+        locations = [
+          (nameValuePair "/" ''
+            try_files $uri $uri/ /index.php?$args;
+          '')
+          (nameValuePair "~ \.php$" ''
+            fastcgi_pass unix:/srv/http/${domain}/phpfpm.pool;
+            include ${pkgs.nginx}/conf/fastcgi.conf;
+          '')
+          #(nameValuePair "~ /\\." ''
+          #  deny all;
+          #'')
+          #Directives to send expires headers and turn off 404 error logging.
+          (nameValuePair "~* ^.+\.(xml|ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|css|rss|atom|js|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$" ''
+            access_log off;
+            log_not_found off;
+            expires max;
+          '')
+        ];
+      };
+      services.phpfpm.poolConfigs."${domain}" = ''
+        listen = /srv/http/${domain}/phpfpm.pool
+        user = nginx
+        group = nginx
+        pm = dynamic
+        pm.max_children = 5
+        pm.start_servers = 2
+        pm.min_spare_servers = 1
+        pm.max_spare_servers = 3
+        listen.owner = nginx
+        listen.group = nginx
+        # errors to journal
+        php_admin_value[error_log] = 'stderr'
+        php_admin_flag[log_errors] = on
+        catch_workers_output = yes
+      '';
+    };
+
+}
diff --git a/lass/2configs/websites/wohnprojekt-rhh.de.nix b/lass/2configs/websites/wohnprojekt-rhh.de.nix
index 858054531..fb1a58109 100644
--- a/lass/2configs/websites/wohnprojekt-rhh.de.nix
+++ b/lass/2configs/websites/wohnprojekt-rhh.de.nix
@@ -1,11 +1,13 @@
 { config, pkgs, lib, ... }:
 
 let
-  inherit (config.krebs.lib) genid;
-  inherit (import ../../4lib { inherit lib pkgs; })
+  inherit (import <stockholm/krebs/4lib> { config = {}; inherit lib; })
+    genid
+  ;
+  inherit (import <stockholm/lass/2configs/websites/util.nix> {inherit lib pkgs;})
     ssl
-    servePage;
-
+    servePage
+  ;
 in {
   imports = [
     ( ssl [ "wohnprojekt-rhh.de" ])
diff --git a/lass/4lib/default.nix b/lass/4lib/default.nix
index 30cbced49..56943b7ac 100644
--- a/lass/4lib/default.nix
+++ b/lass/4lib/default.nix
@@ -1,4 +1,4 @@
-{ lib, pkgs, ... }:
+{ lib, ... }:
 
 with lib;
 
@@ -7,225 +7,4 @@ rec {
   getDefaultGateway = ip:
     concatStringsSep "." (take 3 (splitString "." ip) ++ ["1"]);
 
-  manageCerts = domains:
-    let
-      domain = head domains;
-    in {
-      security.acme = {
-        certs."${domain}" = {
-          email = "lassulus@gmail.com";
-          webroot = "/var/lib/acme/challenges/${domain}";
-          plugins = [
-            "account_key.json"
-            "key.pem"
-            "fullchain.pem"
-          ];
-          group = "nginx";
-          allowKeysForGroup = true;
-          extraDomains = genAttrs domains (_: null);
-        };
-      };
-
-      krebs.nginx.servers."${domain}" = {
-        locations = [
-          (nameValuePair "/.well-known/acme-challenge" ''
-            root /var/lib/acme/challenges/${domain}/;
-          '')
-        ];
-      };
-    };
-
-  ssl = domains:
-    {
-      imports = [
-        ( manageCerts domains )
-        ( activateACME (head domains) )
-      ];
-    };
-
-  activateACME = domain:
-    {
-      krebs.nginx.servers."${domain}" = {
-        ssl = {
-          enable = true;
-          certificate = "/var/lib/acme/${domain}/fullchain.pem";
-          certificate_key = "/var/lib/acme/${domain}/key.pem";
-        };
-      };
-    };
-
-  servePage = domains:
-    let
-      domain = head domains;
-    in {
-      krebs.nginx.servers."${domain}" = {
-        server-names = domains;
-        locations = [
-          (nameValuePair "/" ''
-            root /srv/http/${domain};
-          '')
-        ];
-      };
-    };
-
-  serveOwncloud = domains:
-    let
-      domain = head domains;
-    in {
-      krebs.nginx.servers."${domain}" = {
-        server-names = domains;
-        extraConfig = ''
-          # Add headers to serve security related headers
-          add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
-          add_header X-Content-Type-Options nosniff;
-          add_header X-Frame-Options "SAMEORIGIN";
-          add_header X-XSS-Protection "1; mode=block";
-          add_header X-Robots-Tag none;
-
-          # Path to the root of your installation
-          root /srv/http/${domain}/;
-          # set max upload size
-          client_max_body_size 10G;
-          fastcgi_buffers 64 4K;
-
-          # Disable gzip to avoid the removal of the ETag header
-          gzip off;
-
-          # Uncomment if your server is build with the ngx_pagespeed module
-          # This module is currently not supported.
-          #pagespeed off;
-
-          index index.php;
-          error_page 403 /core/templates/403.php;
-          error_page 404 /core/templates/404.php;
-
-          rewrite ^/.well-known/carddav /remote.php/carddav/ permanent;
-          rewrite ^/.well-known/caldav /remote.php/caldav/ permanent;
-
-          # The following 2 rules are only needed for the user_webfinger app.
-          # Uncomment it if you're planning to use this app.
-          rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
-          rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
-        '';
-        locations = [
-          (nameValuePair "/robots.txt" ''
-            allow all;
-            log_not_found off;
-            access_log off;
-          '')
-          (nameValuePair "~ ^/(build|tests|config|lib|3rdparty|templates|data)/" ''
-            deny all;
-          '')
-
-          (nameValuePair "~ ^/(?:autotest|occ|issue|indie|db_|console)" ''
-            deny all;
-          '')
-
-          (nameValuePair "/" ''
-            rewrite ^/remote/(.*) /remote.php last;
-            rewrite ^(/core/doc/[^\/]+/)$ $1/index.html;
-            try_files $uri $uri/ =404;
-          '')
-
-          (nameValuePair "~ \.php(?:$|/)" ''
-            fastcgi_split_path_info ^(.+\.php)(/.+)$;
-            include ${pkgs.nginx}/conf/fastcgi_params;
-            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
-            fastcgi_param PATH_INFO $fastcgi_path_info;
-            fastcgi_param HTTPS on;
-            fastcgi_param modHeadersAvailable true; #Avoid sending the security headers twice
-            fastcgi_pass unix:/srv/http/${domain}/phpfpm.pool;
-            fastcgi_intercept_errors on;
-          '')
-
-          # Adding the cache control header for js and css files
-          # Make sure it is BELOW the location ~ \.php(?:$|/) { block
-          (nameValuePair "~* \.(?:css|js)$" ''
-            add_header Cache-Control "public, max-age=7200";
-            # Add headers to serve security related headers
-            add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;";
-            add_header X-Content-Type-Options nosniff;
-            add_header X-Frame-Options "SAMEORIGIN";
-            add_header X-XSS-Protection "1; mode=block";
-            add_header X-Robots-Tag none;
-            # Optional: Don't log access to assets
-            access_log off;
-          '')
-
-          # Optional: Don't log access to other assets
-          (nameValuePair "~* \.(?:jpg|jpeg|gif|bmp|ico|png|swf)$" ''
-            access_log off;
-          '')
-        ];
-      };
-      services.phpfpm.poolConfigs."${domain}" = ''
-        listen = /srv/http/${domain}/phpfpm.pool
-        user = nginx
-        group = nginx
-        pm = dynamic
-        pm.max_children = 5
-        pm.start_servers = 2
-        pm.min_spare_servers = 1
-        pm.max_spare_servers = 3
-        listen.owner = nginx
-        listen.group = nginx
-        # errors to journal
-        php_admin_value[error_log] = 'stderr'
-        php_admin_flag[log_errors] = on
-        catch_workers_output = yes
-      '';
-    };
-
-  serveWordpress = domains:
-    let
-      domain = head domains;
-
-    in {
-      krebs.nginx.servers."${domain}" = {
-        server-names = domains;
-        extraConfig = ''
-          root /srv/http/${domain}/;
-          index index.php;
-          access_log /tmp/nginx_acc.log;
-          error_log /tmp/nginx_err.log;
-          error_page 404 /404.html;
-          error_page 500 502 503 504 /50x.html;
-        '';
-        locations = [
-          (nameValuePair "/" ''
-            try_files $uri $uri/ /index.php?$args;
-          '')
-          (nameValuePair "~ \.php$" ''
-            fastcgi_pass unix:/srv/http/${domain}/phpfpm.pool;
-            include ${pkgs.nginx}/conf/fastcgi.conf;
-          '')
-          #(nameValuePair "~ /\\." ''
-          #  deny all;
-          #'')
-          #Directives to send expires headers and turn off 404 error logging.
-          (nameValuePair "~* ^.+\.(xml|ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|css|rss|atom|js|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$" ''
-            access_log off;
-            log_not_found off;
-            expires max;
-          '')
-        ];
-      };
-      services.phpfpm.poolConfigs."${domain}" = ''
-        listen = /srv/http/${domain}/phpfpm.pool
-        user = nginx
-        group = nginx
-        pm = dynamic
-        pm.max_children = 5
-        pm.start_servers = 2
-        pm.min_spare_servers = 1
-        pm.max_spare_servers = 3
-        listen.owner = nginx
-        listen.group = nginx
-        # errors to journal
-        php_admin_value[error_log] = 'stderr'
-        php_admin_flag[log_errors] = on
-        catch_workers_output = yes
-      '';
-    };
-
 }