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nixos/firewall: Always use global firewall.allowed rules

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Apply global firewall.allowed* rules separately from the
interface specific rules.
This commit is contained in:
Ben Blaxill 2018-11-18 15:03:42 -05:00
parent 0925c482c8
commit 551d2f7ed2
1 changed files with 10 additions and 14 deletions
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24
nixos/modules/services/networking/firewall.nix
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@ -151,39 +151,39 @@ let
${concatStrings (mapAttrsToList (iface: cfg:
concatMapStrings (port:
''
ip46tables -A nixos-fw -p tcp --dport ${toString port} -j nixos-fw-accept ${optionalString (iface != "default") "-i ${iface}"}
ip46tables -A nixos-fw -p tcp --dport ${toString port} -j nixos-fw-accept ${optionalString (iface != "any") "-i ${iface}"}
''
) cfg.allowedTCPPorts
) cfg.interfaces)}
) (cfg.interfaces // {any={allowedTCPPorts = cfg.allowedTCPPorts;};}))}
# Accept connections to the allowed TCP port ranges.
${concatStrings (mapAttrsToList (iface: cfg:
concatMapStrings (rangeAttr:
let range = toString rangeAttr.from + ":" + toString rangeAttr.to; in
''
ip46tables -A nixos-fw -p tcp --dport ${range} -j nixos-fw-accept ${optionalString (iface != "default") "-i ${iface}"}
ip46tables -A nixos-fw -p tcp --dport ${range} -j nixos-fw-accept ${optionalString (iface != "any") "-i ${iface}"}
''
) cfg.allowedTCPPortRanges
) cfg.interfaces)}
) (cfg.interfaces // {any={allowedTCPPortRanges = cfg.allowedTCPPortRanges;};}))}
# Accept packets on the allowed UDP ports.
${concatStrings (mapAttrsToList (iface: cfg:
concatMapStrings (port:
''
ip46tables -A nixos-fw -p udp --dport ${toString port} -j nixos-fw-accept ${optionalString (iface != "default") "-i ${iface}"}
ip46tables -A nixos-fw -p udp --dport ${toString port} -j nixos-fw-accept ${optionalString (iface != "any") "-i ${iface}"}
''
) cfg.allowedUDPPorts
) cfg.interfaces)}
) (cfg.interfaces // {any={allowedUDPPorts = cfg.allowedUDPPorts;};}))}
# Accept packets on the allowed UDP port ranges.
${concatStrings (mapAttrsToList (iface: cfg:
concatMapStrings (rangeAttr:
let range = toString rangeAttr.from + ":" + toString rangeAttr.to; in
''
ip46tables -A nixos-fw -p udp --dport ${range} -j nixos-fw-accept ${optionalString (iface != "default") "-i ${iface}"}
ip46tables -A nixos-fw -p udp --dport ${range} -j nixos-fw-accept ${optionalString (iface != "any") "-i ${iface}"}
''
) cfg.allowedUDPPortRanges
) cfg.interfaces)}
) (cfg.interfaces // {any={allowedUDPPortRanges = cfg.allowedUDPPortRanges;};}))}
# Accept IPv4 multicast. Not a big security risk since
# probably nobody is listening anyway.
@ -508,15 +508,11 @@ in
};
interfaces = mkOption {
default = {
default = mapAttrs (name: value: cfg."${name}") commonOptions;
};
default = { };
type = with types; attrsOf (submodule [ { options = commonOptions; } ]);
description =
''
Interface-specific open ports. Setting this value will override
all values of the <literal>networking.firewall.allowed*</literal>
options.
Interface-specific open ports.
'';
};
} // commonOptions;