diff --git a/krops.nix b/krops.nix
index 01ee420..770fcff 100644
--- a/krops.nix
+++ b/krops.nix
@@ -8,7 +8,7 @@ let
       nixos-config.symlink = "config/${machine}/configuration.nix";
       nixpkgs.git = {
         clean.exclude = [ "/.version-suffix" ];
-        ref = "e96c668072d7c98ddf2062f6d2b37f84909a572b"; # nixos-22.05
+        ref = "0d68d7c857fe301d49cdcd56130e0beea4ecd5aa"; # nixos-unstable
         url = "https://github.com/NixOS/nixpkgs";
       };
     }];
diff --git a/machines/core-services-01/acme-ssl.nix b/machines/core-services-01/acme-ssl.nix
index 2403cd6..f111e17 100644
--- a/machines/core-services-01/acme-ssl.nix
+++ b/machines/core-services-01/acme-ssl.nix
@@ -5,9 +5,9 @@ let
 in
 {
   security.acme.acceptTerms = true;
-  security.acme.email = my.email;
+  security.acme.defaults.email = my.email;
 
-  security.acme.server =
+  security.acme.defaults.server =
     if my.acmeStaging
     then "https://acme-staging-v02.api.letsencrypt.org/directory"
     else null;
diff --git a/machines/core-services-01/configuration.nix b/machines/core-services-01/configuration.nix
index f5ae683..8af8554 100644
--- a/machines/core-services-01/configuration.nix
+++ b/machines/core-services-01/configuration.nix
@@ -19,6 +19,7 @@
       ./keycloak.nix
       ./acme-dns.nix
       ./backups.nix
+      ./headscale.nix
       # ./dex.nix
       ./oauth2_proxy.nix
       ./secrets
diff --git a/machines/core-services-01/drone-runners.nix b/machines/core-services-01/drone-runners.nix
index 6793e4b..36ecbdd 100644
--- a/machines/core-services-01/drone-runners.nix
+++ b/machines/core-services-01/drone-runners.nix
@@ -14,5 +14,5 @@ in
     envFile = config.age.secrets.droneKeyFile.path;
   };
 
-  systemd.services."drone-exec-runner-nix01".after = [ "gitea" ];
+  systemd.services."drone-exec-runner-nix01".after = [ "gitea.service" ];
 }
diff --git a/machines/core-services-01/fix-crc-computation.patch b/machines/core-services-01/fix-crc-computation.patch
new file mode 100644
index 0000000..85a6a7e
--- /dev/null
+++ b/machines/core-services-01/fix-crc-computation.patch
@@ -0,0 +1,51 @@
+From ec3df00224d4b396e2ac6586ab5d25f673caa4c2 Mon Sep 17 00:00:00 2001
+From: Mark Adler <madler@alumni.caltech.edu>
+Date: Wed, 30 Mar 2022 11:14:53 -0700
+Subject: [PATCH] Correct incorrect inputs provided to the CRC functions.
+
+The previous releases of zlib were not sensitive to incorrect CRC
+inputs with bits set above the low 32. This commit restores that
+behavior, so that applications with such bugs will continue to
+operate as before.
+---
+ crc32.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/crc32.c b/crc32.c
+index a1bdce5c2..451887bc7 100644
+--- a/crc32.c
++++ b/crc32.c
+@@ -630,7 +630,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+ #endif /* DYNAMIC_CRC_TABLE */
+ 
+     /* Pre-condition the CRC */
+-    crc ^= 0xffffffff;
++    crc = (~crc) & 0xffffffff;
+ 
+     /* Compute the CRC up to a word boundary. */
+     while (len && ((z_size_t)buf & 7) != 0) {
+@@ -749,7 +749,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+ #endif /* DYNAMIC_CRC_TABLE */
+ 
+     /* Pre-condition the CRC */
+-    crc ^= 0xffffffff;
++    crc = (~crc) & 0xffffffff;
+ 
+ #ifdef W
+ 
+@@ -1077,7 +1077,7 @@ uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
+ #ifdef DYNAMIC_CRC_TABLE
+     once(&made, make_crc_table);
+ #endif /* DYNAMIC_CRC_TABLE */
+-    return multmodp(x2nmodp(len2, 3), crc1) ^ crc2;
++    return multmodp(x2nmodp(len2, 3), crc1) ^ (crc2 & 0xffffffff);
+ }
+ 
+ /* ========================================================================= */
+@@ -1112,5 +1112,5 @@ uLong crc32_combine_op(crc1, crc2, op)
+     uLong crc2;
+     uLong op;
+ {
+-    return multmodp(op, crc1) ^ crc2;
++    return multmodp(op, crc1) ^ (crc2 & 0xffffffff);
+ }
diff --git a/machines/core-services-01/headscale.nix b/machines/core-services-01/headscale.nix
new file mode 100644
index 0000000..e44b48a
--- /dev/null
+++ b/machines/core-services-01/headscale.nix
@@ -0,0 +1,8 @@
+{ ... }:
+{
+  services.headscale = {
+    enable = true;
+    serverUrl = "https://tailscale.rz.ens.wtf";
+    tls.letsencrypt.hostname = "tailscale.rz.ens.wtf";
+  };
+}
diff --git a/machines/core-services-01/keycloak.nix b/machines/core-services-01/keycloak.nix
index 6f34b25..e7d48e5 100644
--- a/machines/core-services-01/keycloak.nix
+++ b/machines/core-services-01/keycloak.nix
@@ -1,26 +1,33 @@
-{ config, pkgs, ... }:
+{ config, pkgs, lib, ... }:
 let
   my = config.my;
   port = 8080;
+  keycloak-protocol-cas = pkgs.callPackage ./keycloak/keycloak-protocol-cas.nix {};
+  domain = "auth.${my.subZone}";
+  certs = config.security.acme.certs."${domain}".directory;
 in
 {
   services.keycloak = {
     enable = true;
-    package = pkgs.keycloak.override {
-      jre = pkgs.jre8;
-    };
     initialAdminPassword = "changemeasap";
-    database.createLocally = true;
-    database.passwordFile = config.age.secrets.keycloakDatabasePasswordFile.path; 
-    frontendUrl = "https://auth.${my.subZone}/auth/";
-    forceBackendUrlToFrontendUrl = true;
-    httpPort = toString port;
-    extraConfig = {
-      "subsystem=undertow"."server=default-server"."http-listener=default".proxy-address-forwarding = true;
+    plugins = [ pkgs.keycloak.plugins.keycloak-metrics-spi keycloak-protocol-cas ];
+    database = {
+      type = "postgresql";
+      username = "keycloak";
+      name = "keycloak";
+      createLocally = true;
+      passwordFile = "${config.age.secrets.keycloakDatabasePasswordFile.path}"; 
+    };
+    settings = {
+     hostname-strict-backchannel = true;
+     http-port = port;
+     proxy = "edge";
+     http-relative-path = "/auth";
+     hostname = domain;
     };
   };
 
-  services.nginx.virtualHosts."auth.${my.subZone}" = {
+  services.nginx.virtualHosts."${domain}" = {
     forceSSL = true;
     enableACME = true;
     locations."/" = {
diff --git a/machines/core-services-01/keycloak/keycloak-protocol-cas.nix b/machines/core-services-01/keycloak/keycloak-protocol-cas.nix
new file mode 100644
index 0000000..1783749
--- /dev/null
+++ b/machines/core-services-01/keycloak/keycloak-protocol-cas.nix
@@ -0,0 +1,26 @@
+{ stdenv, lib, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "keycloak-protocol-cas";
+  version = "18.0.0";
+
+  src = fetchurl {
+    url = "https://github.com/jacekkow/keycloak-protocol-cas/releases/download/${version}/keycloak-protocol-cas-${version}.jar";
+    sha256 = "sha256-N+IJqD7oQ4T4MI8klt96kfHwFnPJy5l8MK6bq62nBrM=";
+  };
+
+  dontUnpack = true;
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p $out
+    install "$src" "$out"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/jacekkow/keycloak-protocol-cas";
+    description = "Keycloak Service Provider that adds CAS as an authentication protocol";
+    license = licenses.apsl20;
+    maintainers = with maintainers; [ raitobezarius ];
+  };
+}
diff --git a/machines/core-services-01/monitoring.nix b/machines/core-services-01/monitoring.nix
index f9812f9..47b7953 100644
--- a/machines/core-services-01/monitoring.nix
+++ b/machines/core-services-01/monitoring.nix
@@ -65,7 +65,7 @@ in
     "health_alarm_notify"
   ];
 
-  environment.etc."netdata/netdata.conf" = {
+  environment.etc."netdata/netdata.conf" = lib.mkForce {
     user = "netdata";
     group = "netdata";
     mode = "0600";
diff --git a/machines/core-services-01/subZone.nix b/machines/core-services-01/subZone.nix
index 08db8c1..2738afe 100644
--- a/machines/core-services-01/subZone.nix
+++ b/machines/core-services-01/subZone.nix
@@ -37,6 +37,7 @@ dualstack // {
     monitoring = dualstack;
     auth = dualstack;
     push = dualstack;
+    tailscale = dualstack;
     core01 = dualstack;
     ns1 = dualstack;
 
diff --git a/machines/public-cof/configuration.nix b/machines/public-cof/configuration.nix
index ef33c32..b47cf2c 100644
--- a/machines/public-cof/configuration.nix
+++ b/machines/public-cof/configuration.nix
@@ -14,7 +14,7 @@
       ./nur.nix
       # ./factorio.nix # TODO
       ./nginx.nix
-      ./cryptpad.nix
+      # ./cryptpad.nix
       ./hedgedoc.nix
       ./secrets
       # TODO monitoring
diff --git a/machines/public-cof/nextcloud.nix b/machines/public-cof/nextcloud.nix
index 99e6e17..b243afb 100644
--- a/machines/public-cof/nextcloud.nix
+++ b/machines/public-cof/nextcloud.nix
@@ -5,7 +5,7 @@
     hostName = "nuage.beta.rz.ens.wtf";
     https = true;
 
-    package = pkgs.nextcloud22;
+    package = pkgs.nextcloud23;
 
     config = {
       overwriteProtocol = "https";