diff --git a/modules/hedgedoc.nix b/modules/hedgedoc.nix
index 1c2ef0a..d3bce46 100644
--- a/modules/hedgedoc.nix
+++ b/modules/hedgedoc.nix
@@ -44,15 +44,17 @@ in
         allowAnonymousEdits = true;
         defaultPermission = "limited";
         # ldap auth
-        ldap = rec {
-          url = "ldap://localhost";
-          searchBase = "ou=users,${config.services.portunus.ldap.suffix}";
-          searchFilter = "(uid={{username}})";
-          bindDn = "uid=${config.services.portunus.ldap.searchUserName},${searchBase}";
-          bindCredentials = "\${LDAP_CREDENTIALS}";
-          useridField = "uid";
-          providerName = "iFSR";
-        };
+        ldap =
+          let portunus = config.services.portunus;
+          in rec {
+            url = "ldaps://${portunus.domain}";
+            searchBase = "ou=users,${portunus.ldap.suffix}";
+            searchFilter = "(uid={{username}})";
+            bindDn = "uid=${portunus.ldap.searchUserName},${searchBase}";
+            bindCredentials = "\${LDAP_CREDENTIALS}";
+            useridField = "uid";
+            providerName = "iFSR";
+          };
       };
     };
 
diff --git a/modules/ldap.nix b/modules/ldap.nix
index 20755e4..4ccc19d 100644
--- a/modules/ldap.nix
+++ b/modules/ldap.nix
@@ -7,18 +7,13 @@ let
         name = "admins";
         long_name = "Portunus Admin";
         members = [ "admin" ];
-        permissions = {
-          portunus.is_admin = true;
-          ldap.can_read = true;
-        };
+        permissions.portunus.is_admin = true;
       }
       {
         name = "search";
         long_name = "LDAP search group";
         members = [ "search" ];
-        permissions = {
-          ldap.can_read = true;
-        };
+        permissions.ldap.can_read = true;
       }
       {
         name = "fsr";
@@ -73,7 +68,7 @@ in
 
         # disables port 389, use 636 with tls
         # `portunus.domain` resolves to localhost
-        tls = false;
+        tls = true;
       };
 
       seedPath = pkgs.writeText "portunus-seed.json" (builtins.toJSON seed);
@@ -113,7 +108,7 @@ in
       let portunus = config.services.portunus;
       in rec {
         enable = true;
-        server = "ldap://localhost";
+        server = "ldaps://${portunus.domain}";
         base = "ou=users,${portunus.ldap.suffix}";
         bind = {
           distinguishedName = "uid=${portunus.ldap.searchUserName},${base}";
diff --git a/modules/mail.nix b/modules/mail.nix
index d047743..157db93 100644
--- a/modules/mail.nix
+++ b/modules/mail.nix
@@ -11,7 +11,7 @@ let
   #result_attribute=mail
   #'';
   dovecot-ldap-args = pkgs.writeText "ldap-args" ''
-    uris = ldap://localhost
+    uris = ldaps://${config.services.portunus.domain}
     dn = uid=search, ou=users, dc=ifsr, dc=de
     auth_bind = yes
     !include ${config.sops.secrets."dovecot_ldap_search".path}
diff --git a/modules/mailman.nix b/modules/mailman.nix
index 866ae57..1099728 100644
--- a/modules/mailman.nix
+++ b/modules/mailman.nix
@@ -13,7 +13,7 @@
     siteOwner = "root@${config.fsr.domain}";
     ldap = {
       enable = true;
-      serverUri = "ldap://localhost";
+      serverUri = "ldaps://${config.services.portunus.domain}";
       bindDn = "uid=search, ou=users, dc=ifsr, dc=de";
       bindPasswordFile = config.sops.secrets.mailman_ldap_search.path;
       userSearch = {
diff --git a/modules/matrix.nix b/modules/matrix.nix
index a79e4a7..80da2a8 100644
--- a/modules/matrix.nix
+++ b/modules/matrix.nix
@@ -101,7 +101,7 @@ in
               - module: ldap_auth_provider.LdapAuthProviderModule
                 config:
                   enabled: true
-                  uri: ldap://localhost
+                  uri: ldaps://${portunus.domain}
                   base: ou=users,${portunus.ldap.suffix}
                   # taken from kaki config
                   attributes:
diff --git a/modules/sogo.nix b/modules/sogo.nix
index 4ac2eb4..37bb780 100644
--- a/modules/sogo.nix
+++ b/modules/sogo.nix
@@ -28,7 +28,7 @@ in
                   baseDN = "ou=users, dc=ifsr, dc=de";
                   bindDN = "uid=search, ou=users, dc=ifsr, dc=de";
                   bindPassword = LDAP_SEARCH;
-                  hostname = "ldap://localhost";
+                  hostname = "ldaps://${config.services.portunus.domain}";
                   canAuthenticate = YES;
                   id = directory;