59 lines
1.9 KiB
Nix
59 lines
1.9 KiB
Nix
# See `man systemd.exec` and `man systemd.resource-control` for an explanation
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# of the various systemd options available through this module.
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lib: pkgs:
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with lib;
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{
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# These settings roughly follow systemd's "strict" security profile
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defaultHardening = {
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PrivateTmp = "true";
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ProtectSystem = "strict";
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ProtectHome = "true";
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NoNewPrivileges = "true";
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PrivateDevices = "true";
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MemoryDenyWriteExecute = "true";
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ProtectKernelTunables = "true";
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ProtectKernelModules = "true";
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ProtectControlGroups = "true";
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RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";
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RestrictNamespaces = "true";
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LockPersonality = "true";
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IPAddressDeny = "any";
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PrivateUsers = "true";
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RestrictSUIDSGID = "true";
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RemoveIPC = "true";
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RestrictRealtime = "true";
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ProtectHostname = "true";
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CapabilityBoundingSet = "";
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# @system-service whitelist and docker seccomp blacklist (except for "clone"
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# which is a core requirement for systemd services)
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SystemCallFilter = [ "@system-service" "~add_key clone3 get_mempolicy kcmp keyctl mbind move_pages name_to_handle_at personality process_vm_readv process_vm_writev request_key set_mempolicy setns unshare userfaultfd" ];
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SystemCallArchitectures= "native";
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};
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# nodejs applications apparently rely on memory write execute
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nodejs = { MemoryDenyWriteExecute = "false"; };
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# Allow tor traffic. Allow takes precedence over Deny.
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allowTor = {
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IPAddressAllow = "127.0.0.1/32 ::1/128";
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};
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# Allow any traffic
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allowAnyIP = { IPAddressAllow = "any"; };
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allowAnyProtocol = { RestrictAddressFamilies = "~"; };
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enforceTor = mkOption {
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type = types.bool;
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default = false;
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description = ''
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"Whether to force Tor on a service by only allowing connections from and
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to 127.0.0.1;";
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'';
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};
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script = src: pkgs.writers.writeBash "script" ''
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set -eo pipefail
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${src}
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'';
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}
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