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nixos/nitter: systemd unit hardening

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Alexandre Iooss 2021-08-08 10:27:01 +02:00
parent 3a3f82631f
commit 9898f7e072
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25
nixos/modules/services/misc/nitter.nix
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@ -312,6 +312,31 @@ in
AmbientCapabilities = lib.mkIf (cfg.server.port < 1024) [ "CAP_NET_BIND_SERVICE" ];
Restart = "on-failure";
RestartSec = "5s";
# Hardening
CapabilityBoundingSet = if (cfg.server.port < 1024) then [ "CAP_NET_BIND_SERVICE" ] else [ "" ];
DeviceAllow = [ "" ];
LockPersonality = true;
MemoryDenyWriteExecute = true;
PrivateDevices = true;
# A private user cannot have process capabilities on the host's user
# namespace and thus CAP_NET_BIND_SERVICE has no effect.
PrivateUsers = (cfg.server.port >= 1024);
ProcSubset = "pid";
ProtectClock = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectHostname = true;
ProtectKernelLogs = true;
ProtectKernelModules = true;
ProtectKernelTunables = true;
ProtectProc = "invisible";
RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
RestrictNamespaces = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
SystemCallArchitectures = "native";
SystemCallFilter = [ "@system-service" "~@privileged" "~@resources" ];
UMask = "0077";
};
};