diff options
Diffstat (limited to 'nixos/modules/services')
| -rw-r--r-- | nixos/modules/services/backup/duplicati.nix | 19 | ||||
| -rw-r--r-- | nixos/modules/services/networking/sslh.nix | 114 | ||||
| -rw-r--r-- | nixos/modules/services/security/munge.nix | 16 |
3 files changed, 128 insertions, 21 deletions
diff --git a/nixos/modules/services/backup/duplicati.nix b/nixos/modules/services/backup/duplicati.nix index 9772ca4d20a7..379fde1fe038 100644 --- a/nixos/modules/services/backup/duplicati.nix +++ b/nixos/modules/services/backup/duplicati.nix @@ -9,6 +9,23 @@ in options = { services.duplicati = { enable = mkEnableOption "Duplicati"; + + port = mkOption { + default = 8200; + type = types.int; + description = '' + Port serving the web interface + ''; + }; + + interface = mkOption { + default = "lo"; + type = types.str; + description = '' + Listening interface for the web UI + Set it to "any" to listen on all available interfaces + ''; + }; }; }; @@ -22,7 +39,7 @@ in serviceConfig = { User = "duplicati"; Group = "duplicati"; - ExecStart = "${pkgs.duplicati}/bin/duplicati-server --webservice-interface=any --webservice-port=8200 --server-datafolder=/var/lib/duplicati"; + ExecStart = "${pkgs.duplicati}/bin/duplicati-server --webservice-interface=${cfg.interface} --webservice-port=${toString cfg.port} --server-datafolder=/var/lib/duplicati"; Restart = "on-failure"; }; }; diff --git a/nixos/modules/services/networking/sslh.nix b/nixos/modules/services/networking/sslh.nix index e3d65c49fbf2..0222e8ce8b58 100644 --- a/nixos/modules/services/networking/sslh.nix +++ b/nixos/modules/services/networking/sslh.nix @@ -4,15 +4,14 @@ with lib; let cfg = config.services.sslh; + user = "sslh"; configFile = pkgs.writeText "sslh.conf" '' verbose: ${boolToString cfg.verbose}; foreground: true; inetd: false; numeric: false; - transparent: false; + transparent: ${boolToString cfg.transparent}; timeout: "${toString cfg.timeout}"; - user: "nobody"; - pidfile: "${cfg.pidfile}"; listen: ( @@ -50,16 +49,16 @@ in description = "Timeout in seconds."; }; - pidfile = mkOption { - type = types.path; - default = "/run/sslh.pid"; - description = "PID file path for sslh daemon."; + transparent = mkOption { + type = types.bool; + default = false; + description = "Will the services behind sslh (Apache, sshd and so on) see the external IP and ports as if the external world connected directly to them"; }; listenAddress = mkOption { type = types.str; - default = config.networking.hostName; - description = "Listening hostname."; + default = "0.0.0.0"; + description = "Listening address or hostname."; }; port = mkOption { @@ -76,14 +75,91 @@ in }; }; - config = mkIf cfg.enable { - systemd.services.sslh = { - description = "Applicative Protocol Multiplexer (e.g. share SSH and HTTPS on the same port)"; - after = [ "network.target" ]; - wantedBy = [ "multi-user.target" ]; - serviceConfig.ExecStart = "${pkgs.sslh}/bin/sslh -F${configFile}"; - serviceConfig.KillMode = "process"; - serviceConfig.PIDFile = "${cfg.pidfile}"; - }; - }; + config = mkMerge [ + (mkIf cfg.enable { + users.users.${user} = { + description = "sslh daemon user"; + isSystemUser = true; + }; + + systemd.services.sslh = { + description = "Applicative Protocol Multiplexer (e.g. share SSH and HTTPS on the same port)"; + after = [ "network.target" ]; + wantedBy = [ "multi-user.target" ]; + + serviceConfig = { + User = user; + Group = "nogroup"; + PermissionsStartOnly = true; + Restart = "always"; + RestartSec = "1s"; + ExecStart = "${pkgs.sslh}/bin/sslh -F${configFile}"; + KillMode = "process"; + AmbientCapabilities = "CAP_NET_BIND_SERVICE CAP_NET_ADMIN CAP_SETGID CAP_SETUID"; + PrivateTmp = true; + PrivateDevices = true; + ProtectSystem = "full"; + ProtectHome = true; + }; + }; + }) + + # code from https://github.com/yrutschle/sslh#transparent-proxy-support + # the only difference is using iptables mark 0x2 instead of 0x1 to avoid conflicts with nixos/nat module + (mkIf (cfg.enable && cfg.transparent) { + # Set route_localnet = 1 on all interfaces so that ssl can use "localhost" as destination + boot.kernel.sysctl."net.ipv4.conf.default.route_localnet" = 1; + boot.kernel.sysctl."net.ipv4.conf.all.route_localnet" = 1; + + systemd.services.sslh = let + iptablesCommands = [ + # DROP martian packets as they would have been if route_localnet was zero + # Note: packets not leaving the server aren't affected by this, thus sslh will still work + { table = "raw"; command = "PREROUTING ! -i lo -d 127.0.0.0/8 -j DROP"; } + { table = "mangle"; command = "POSTROUTING ! -o lo -s 127.0.0.0/8 -j DROP"; } + # Mark all connections made by ssl for special treatment (here sslh is run as user ${user}) + { table = "nat"; command = "OUTPUT -m owner --uid-owner ${user} -p tcp --tcp-flags FIN,SYN,RST,ACK SYN -j CONNMARK --set-xmark 0x02/0x0f"; } + # Outgoing packets that should go to sslh instead have to be rerouted, so mark them accordingly (copying over the connection mark) + { table = "mangle"; command = "OUTPUT ! -o lo -p tcp -m connmark --mark 0x02/0x0f -j CONNMARK --restore-mark --mask 0x0f"; } + ]; + ip6tablesCommands = [ + { table = "raw"; command = "PREROUTING ! -i lo -d ::1/128 -j DROP"; } + { table = "mangle"; command = "POSTROUTING ! -o lo -s ::1/128 -j DROP"; } + { table = "nat"; command = "OUTPUT -m owner --uid-owner ${user} -p tcp --tcp-flags FIN,SYN,RST,ACK SYN -j CONNMARK --set-xmark 0x02/0x0f"; } + { table = "mangle"; command = "OUTPUT ! -o lo -p tcp -m connmark --mark 0x02/0x0f -j CONNMARK --restore-mark --mask 0x0f"; } + ]; + in { + path = [ pkgs.iptables pkgs.iproute pkgs.procps ]; + + preStart = '' + # Cleanup old iptables entries which might be still there + ${concatMapStringsSep "\n" ({table, command}: "while iptables -w -t ${table} -D ${command} 2>/dev/null; do echo; done") iptablesCommands} + ${concatMapStringsSep "\n" ({table, command}: "iptables -w -t ${table} -A ${command}" ) iptablesCommands} + + # Configure routing for those marked packets + ip rule add fwmark 0x2 lookup 100 + ip route add local 0.0.0.0/0 dev lo table 100 + + '' + optionalString config.networking.enableIPv6 '' + ${concatMapStringsSep "\n" ({table, command}: "while ip6tables -w -t ${table} -D ${command} 2>/dev/null; do echo; done") ip6tablesCommands} + ${concatMapStringsSep "\n" ({table, command}: "ip6tables -w -t ${table} -A ${command}" ) ip6tablesCommands} + + ip -6 rule add fwmark 0x2 lookup 100 + ip -6 route add local ::/0 dev lo table 100 + ''; + + postStop = '' + ${concatMapStringsSep "\n" ({table, command}: "iptables -w -t ${table} -D ${command}") iptablesCommands} + + ip rule del fwmark 0x2 lookup 100 + ip route del local 0.0.0.0/0 dev lo table 100 + '' + optionalString config.networking.enableIPv6 '' + ${concatMapStringsSep "\n" ({table, command}: "ip6tables -w -t ${table} -D ${command}") ip6tablesCommands} + + ip -6 rule del fwmark 0x2 lookup 100 + ip -6 route del local ::/0 dev lo table 100 + ''; + }; + }) + ]; } diff --git a/nixos/modules/services/security/munge.nix b/nixos/modules/services/security/munge.nix index 919c2c2b0e15..5bca15833544 100644 --- a/nixos/modules/services/security/munge.nix +++ b/nixos/modules/services/security/munge.nix @@ -35,7 +35,15 @@ in environment.systemPackages = [ pkgs.munge ]; - systemd.services.munged = { + users.users.munge = { + description = "Munge daemon user"; + isSystemUser = true; + group = "munge"; + }; + + users.groups.munge = {}; + + systemd.services.munged = { wantedBy = [ "multi-user.target" ]; after = [ "network.target" ]; @@ -44,14 +52,20 @@ in preStart = '' chmod 0700 ${cfg.password} mkdir -p /var/lib/munge -m 0711 + chown -R munge:munge /var/lib/munge mkdir -p /var/log/munge -m 0700 + chown -R munge:munge /var/log/munge mkdir -p /run/munge -m 0755 + chown -R munge:munge /run/munge ''; serviceConfig = { ExecStart = "${pkgs.munge}/bin/munged --syslog --key-file ${cfg.password}"; PIDFile = "/run/munge/munged.pid"; ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID"; + PermissionsStartOnly = "true"; + User = "munge"; + Group = "munge"; }; }; |