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-rw-r--r--nixos/modules/services/networking/gateone.nix4
-rw-r--r--nixos/modules/services/networking/ircd-hybrid/ircd.conf2
-rw-r--r--nixos/modules/services/networking/pleroma.nix8
-rw-r--r--nixos/modules/services/networking/pptpd.nix2
-rw-r--r--nixos/modules/services/networking/prayer.nix2
-rw-r--r--nixos/modules/services/networking/ssh/sshd.nix1
-rw-r--r--nixos/modules/services/networking/supplicant.nix4
-rw-r--r--nixos/modules/services/networking/tailscale.nix27
-rw-r--r--nixos/modules/services/networking/uptermd.nix106
-rw-r--r--nixos/modules/services/networking/xl2tpd.nix6
10 files changed, 145 insertions, 17 deletions
diff --git a/nixos/modules/services/networking/gateone.nix b/nixos/modules/services/networking/gateone.nix
index 3e3a3c1aa94d4..e68f8a47d5c0d 100644
--- a/nixos/modules/services/networking/gateone.nix
+++ b/nixos/modules/services/networking/gateone.nix
@@ -36,11 +36,11 @@ config = mkIf cfg.enable {
     preStart = ''
       if [ ! -d ${cfg.settingsDir} ] ; then
         mkdir -m 0750 -p ${cfg.settingsDir}
-        chown -R gateone.gateone ${cfg.settingsDir}
+        chown -R gateone:gateone ${cfg.settingsDir}
       fi
       if [ ! -d ${cfg.pidDir} ] ; then
         mkdir -m 0750 -p ${cfg.pidDir}
-        chown -R gateone.gateone ${cfg.pidDir}
+        chown -R gateone:gateone ${cfg.pidDir}
       fi
       '';
     #unitConfig.RequiresMountsFor = "${cfg.settingsDir}";
diff --git a/nixos/modules/services/networking/ircd-hybrid/ircd.conf b/nixos/modules/services/networking/ircd-hybrid/ircd.conf
index 17ef203840af5..b82094cf5f093 100644
--- a/nixos/modules/services/networking/ircd-hybrid/ircd.conf
+++ b/nixos/modules/services/networking/ircd-hybrid/ircd.conf
@@ -98,7 +98,7 @@ serverinfo {
 	 * 
 	 * 	openssl genrsa -out rsa.key 2048
 	 *	openssl rsa -in rsa.key -pubout -out rsa.pub
-	 *	chown <ircd-user>.<ircd.group> rsa.key rsa.pub
+	 *	chown <ircd-user>:<ircd.group> rsa.key rsa.pub
 	 *	chmod 0600 rsa.key
 	 *	chmod 0644 rsa.pub
 	 */
diff --git a/nixos/modules/services/networking/pleroma.nix b/nixos/modules/services/networking/pleroma.nix
index c6d4c14dcb7e2..9b8382392c0a7 100644
--- a/nixos/modules/services/networking/pleroma.nix
+++ b/nixos/modules/services/networking/pleroma.nix
@@ -1,7 +1,6 @@
 { config, options, lib, pkgs, stdenv, ... }:
 let
   cfg = config.services.pleroma;
-  cookieFile = "/var/lib/pleroma/.cookie";
 in {
   options = {
     services.pleroma = with lib; {
@@ -9,7 +8,7 @@ in {
 
       package = mkOption {
         type = types.package;
-        default = pkgs.pleroma.override { inherit cookieFile; };
+        default = pkgs.pleroma;
         defaultText = literalExpression "pkgs.pleroma";
         description = "Pleroma package to use.";
       };
@@ -101,6 +100,7 @@ in {
       after = [ "network-online.target" "postgresql.service" ];
       wantedBy = [ "multi-user.target" ];
       restartTriggers = [ config.environment.etc."/pleroma/config.exs".source ];
+      environment.RELEASE_COOKIE = "/var/lib/pleroma/.cookie";
       serviceConfig = {
         User = cfg.user;
         Group = cfg.group;
@@ -118,10 +118,10 @@ in {
         # Better be safe than sorry migration-wise.
         ExecStartPre =
           let preScript = pkgs.writers.writeBashBin "pleromaStartPre" ''
-            if [ ! -f "${cookieFile}" ] || [ ! -s "${cookieFile}" ]
+            if [ ! -f /var/lib/pleroma/.cookie ]
             then
               echo "Creating cookie file"
-              dd if=/dev/urandom bs=1 count=16 | ${pkgs.hexdump}/bin/hexdump -e '16/1 "%02x"' > "${cookieFile}"
+              dd if=/dev/urandom bs=1 count=16 | hexdump -e '16/1 "%02x"' > /var/lib/pleroma/.cookie
             fi
             ${cfg.package}/bin/pleroma_ctl migrate
           '';
diff --git a/nixos/modules/services/networking/pptpd.nix b/nixos/modules/services/networking/pptpd.nix
index 3e7753b9dd352..423e14e998f85 100644
--- a/nixos/modules/services/networking/pptpd.nix
+++ b/nixos/modules/services/networking/pptpd.nix
@@ -108,7 +108,7 @@ with lib;
         #username	pptpd	password	*
         EOF
 
-        chown root.root "$secrets"
+        chown root:root "$secrets"
         chmod 600 "$secrets"
       '';
 
diff --git a/nixos/modules/services/networking/prayer.nix b/nixos/modules/services/networking/prayer.nix
index ae9258b27122f..513509eaca3ab 100644
--- a/nixos/modules/services/networking/prayer.nix
+++ b/nixos/modules/services/networking/prayer.nix
@@ -82,7 +82,7 @@ in
       serviceConfig.Type = "forking";
       preStart = ''
         mkdir -m 0755 -p ${stateDir}
-        chown ${prayerUser}.${prayerGroup} ${stateDir}
+        chown ${prayerUser}:${prayerGroup} ${stateDir}
       '';
       script = "${prayer}/sbin/prayer --config-file=${prayerCfg}";
     };
diff --git a/nixos/modules/services/networking/ssh/sshd.nix b/nixos/modules/services/networking/ssh/sshd.nix
index 230ab673a9761..d467c3c0471cf 100644
--- a/nixos/modules/services/networking/ssh/sshd.nix
+++ b/nixos/modules/services/networking/ssh/sshd.nix
@@ -441,6 +441,7 @@ in
 
                 ${flip concatMapStrings cfg.hostKeys (k: ''
                   if ! [ -s "${k.path}" ]; then
+                      rm -f "${k.path}"
                       ssh-keygen \
                         -t "${k.type}" \
                         ${if k ? bits then "-b ${toString k.bits}" else ""} \
diff --git a/nixos/modules/services/networking/supplicant.nix b/nixos/modules/services/networking/supplicant.nix
index 8df450a11c633..e111b311d68f4 100644
--- a/nixos/modules/services/networking/supplicant.nix
+++ b/nixos/modules/services/networking/supplicant.nix
@@ -226,10 +226,10 @@ in
               ACTION=="add", SUBSYSTEM=="net", ENV{INTERFACE}=="${i}", TAG+="systemd", ENV{SYSTEMD_WANTS}+="supplicant-${replaceChars [" "] ["-"] iface}.service", TAG+="SUPPLICANT_ASSIGNED"''))}
 
           ${optionalString (hasAttr "WLAN" cfg) ''
-            ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", TAG!="SUPPLICANT_ASSIGNED", TAG+="systemd", PROGRAM="${pkgs.systemd}/bin/systemd-escape -p %E{INTERFACE}", ENV{SYSTEMD_WANTS}+="supplicant-wlan@$result.service"
+            ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="wlan", TAG!="SUPPLICANT_ASSIGNED", TAG+="systemd", PROGRAM="/run/current-system/systemd/bin/systemd-escape -p %E{INTERFACE}", ENV{SYSTEMD_WANTS}+="supplicant-wlan@$result.service"
           ''}
           ${optionalString (hasAttr "LAN" cfg) ''
-            ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="lan", TAG!="SUPPLICANT_ASSIGNED", TAG+="systemd", PROGRAM="${pkgs.systemd}/bin/systemd-escape -p %E{INTERFACE}", ENV{SYSTEMD_WANTS}+="supplicant-lan@$result.service"
+            ACTION=="add", SUBSYSTEM=="net", ENV{DEVTYPE}=="lan", TAG!="SUPPLICANT_ASSIGNED", TAG+="systemd", PROGRAM="/run/current-system/systemd/bin/systemd-escape -p %E{INTERFACE}", ENV{SYSTEMD_WANTS}+="supplicant-lan@$result.service"
           ''}
         '';
       })];
diff --git a/nixos/modules/services/networking/tailscale.nix b/nixos/modules/services/networking/tailscale.nix
index 1f64113950a79..0133874d0e0d0 100644
--- a/nixos/modules/services/networking/tailscale.nix
+++ b/nixos/modules/services/networking/tailscale.nix
@@ -2,9 +2,13 @@
 
 with lib;
 
-let cfg = config.services.tailscale;
+let
+  cfg = config.services.tailscale;
+  firewallOn = config.networking.firewall.enable;
+  rpfMode = config.networking.firewall.checkReversePath;
+  rpfIsStrict = rpfMode == true || rpfMode == "strict";
 in {
-  meta.maintainers = with maintainers; [ danderson mbaillie ];
+  meta.maintainers = with maintainers; [ danderson mbaillie twitchyliquid64 ];
 
   options.services.tailscale = {
     enable = mkEnableOption "Tailscale client daemon";
@@ -36,17 +40,34 @@ in {
   };
 
   config = mkIf cfg.enable {
+    warnings = optional (firewallOn && rpfIsStrict) "Strict reverse path filtering breaks Tailscale exit node use and some subnet routing setups. Consider setting `networking.firewall.checkReversePath` = 'loose'";
     environment.systemPackages = [ cfg.package ]; # for the CLI
     systemd.packages = [ cfg.package ];
     systemd.services.tailscaled = {
       wantedBy = [ "multi-user.target" ];
-      path = [ pkgs.openresolv pkgs.procps ];
+      path = [
+        pkgs.openresolv # for configuring DNS in some configs
+        pkgs.procps     # for collecting running services (opt-in feature)
+        pkgs.glibc      # for `getent` to look up user shells
+      ];
       serviceConfig.Environment = [
         "PORT=${toString cfg.port}"
         ''"FLAGS=--tun ${lib.escapeShellArg cfg.interfaceName}"''
       ] ++ (lib.optionals (cfg.permitCertUid != null) [
         "TS_PERMIT_CERT_UID=${cfg.permitCertUid}"
       ]);
+      # Restart tailscaled with a single `systemctl restart` at the
+      # end of activation, rather than a `stop` followed by a later
+      # `start`. Activation over Tailscale can hang for tens of
+      # seconds in the stop+start setup, if the activation script has
+      # a significant delay between the stop and start phases
+      # (e.g. script blocked on another unit with a slow shutdown).
+      #
+      # Tailscale is aware of the correctness tradeoff involved, and
+      # already makes its upstream systemd unit robust against unit
+      # version mismatches on restart for compatibility with other
+      # linux distros.
+      stopIfChanged = false;
     };
   };
 }
diff --git a/nixos/modules/services/networking/uptermd.nix b/nixos/modules/services/networking/uptermd.nix
new file mode 100644
index 0000000000000..072f561f5c3c6
--- /dev/null
+++ b/nixos/modules/services/networking/uptermd.nix
@@ -0,0 +1,106 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.uptermd;
+in
+{
+  options = {
+    services.uptermd = {
+      enable = mkEnableOption "uptermd";
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to open the firewall for the port in <option>services.uptermd.port</option>.
+        '';
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 2222;
+        description = ''
+          Port the server will listen on.
+        '';
+      };
+
+      listenAddress = mkOption {
+        type = types.str;
+        default = "[::]";
+        example = "127.0.0.1";
+        description = ''
+          Address the server will listen on.
+        '';
+      };
+
+      hostKey = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        example = "/run/keys/upterm_host_ed25519_key";
+        description = ''
+          Path to SSH host key. If not defined, an ed25519 keypair is generated automatically.
+        '';
+      };
+
+      extraFlags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        example = [ "--debug" ];
+        description = ''
+          Extra flags passed to the uptermd command.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    networking.firewall = mkIf cfg.openFirewall {
+      allowedTCPPorts = [ cfg.port ];
+    };
+
+    systemd.services.uptermd = {
+      description = "Upterm Daemon";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      path = [ pkgs.openssh ];
+
+      preStart = mkIf (cfg.hostKey == null) ''
+        if ! [ -f ssh_host_ed25519_key ]; then
+          ssh-keygen \
+            -t ed25519 \
+            -f ssh_host_ed25519_key \
+            -N ""
+        fi
+      '';
+
+      serviceConfig = {
+        StateDirectory = "uptermd";
+        WorkingDirectory = "/var/lib/uptermd";
+        ExecStart = "${pkgs.upterm}/bin/uptermd --ssh-addr ${cfg.listenAddress}:${toString cfg.port} --private-key ${if cfg.hostKey == null then "ssh_host_ed25519_key" else cfg.hostKey} ${concatStringsSep " " cfg.extraFlags}";
+
+        # Hardening
+        AmbientCapabilities = mkIf (cfg.port < 1024) [ "CAP_NET_BIND_SERVICE" ];
+        CapabilityBoundingSet = mkIf (cfg.port < 1024) [ "CAP_NET_BIND_SERVICE" ];
+        PrivateUsers = cfg.port >= 1024;
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        PrivateDevices = true;
+        ProtectClock = true;
+        ProtectControlGroups = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        SystemCallArchitectures = "native";
+        SystemCallFilter = "@system-service";
+      };
+    };
+  };
+}
diff --git a/nixos/modules/services/networking/xl2tpd.nix b/nixos/modules/services/networking/xl2tpd.nix
index 7dbe51422d964..9418488c1e94f 100644
--- a/nixos/modules/services/networking/xl2tpd.nix
+++ b/nixos/modules/services/networking/xl2tpd.nix
@@ -116,18 +116,18 @@ with lib;
         #username	xl2tpd	password	*
         EOF
 
-        chown root.root ppp/chap-secrets
+        chown root:root ppp/chap-secrets
         chmod 600 ppp/chap-secrets
 
         # The documentation says this file should be present but doesn't explain why and things work even if not there:
         [ -f l2tp-secrets ] || (echo -n "* * "; ${pkgs.apg}/bin/apg -n 1 -m 32 -x 32 -a 1 -M LCN) > l2tp-secrets
-        chown root.root l2tp-secrets
+        chown root:root l2tp-secrets
         chmod 600 l2tp-secrets
 
         popd > /dev/null
 
         mkdir -p /run/xl2tpd
-        chown root.root /run/xl2tpd
+        chown root:root /run/xl2tpd
         chmod 700       /run/xl2tpd
       '';