install/logical/friot/shorewall.nix

   1 {pkgs, lib, config, ...}:
   2 let inherit (builtins) hasAttr;
   3     inherit (config.services) shorewall shorewall6;
   4     unlines = lib.concatStringsSep "\n";
   5     zones4 = config.networking.zones;
   6     zones6 = config.networking.zones;
   7 in
   8 {
   9 config = {
  10   services.shorewall = {
  11     enable  = true;
  12     configs = {
  13       "shorewall.conf" = ''
  14         ${builtins.readFile "${shorewall.package}/etc/shorewall/shorewall.conf"}
  15         #
  16         ## Custom config
  17         ###
  18         STARTUP_ENABLED=Yes
  19         ZONE2ZONE=2
  20         '';
  21       zones = ''
  22         # DOC: shorewall-zones(5)
  23         fw firewall
  24         '' + unlines (lib.mapAttrsToList (zone: _: "${zone} ipv4") zones4);
  25       interfaces = ''
  26         # DOC: shorewall-interfaces(5)
  27         ?FORMAT 2
  28         '' + unlines (lib.mapAttrsToList (zone: {iface, ...}:
  29           "${zone} ${iface} arp_filter,nosmurfs,routefilter,tcpflags") zones4);
  30       policy = ''
  31         # DOC: shorewall-policy(5)
  32         $FW all DROP
  33         '' + unlines (lib.mapAttrsToList (zone: _:
  34           "${zone} all DROP none") zones4)
  35         + ''
  36         # XXX: the following policy must be last
  37         all all REJECT none
  38         '';
  39       rules = ''
  40         # DOC: shorewall-rules(5)
  41         #SECTION ALL
  42         #SECTION ESTABLISHED
  43         #SECTION RELATED
  44         ?SECTION NEW
  45         ''
  46         + lib.optionalString (hasAttr "lan" zones4) ''
  47         # ----------
  48         # $FW -> lan
  49         # ----------
  50         ACCEPT $FW lan:${config.networking.zones.lan.ipv4}/24
  51
  52         # ----------
  53         # lan -> $FW
  54         # ----------
  55         ACCEPT lan:${config.networking.zones.lan.ipv4}/24 $FW
  56         ''
  57         + lib.optionalString (hasAttr "net" zones4) ''
  58         # ----------
  59         # $FW -> net
  60         # ----------
  61
  62         # By protocol
  63         Ping(ACCEPT) $FW net
  64
  65         # By port
  66         DNS(ACCEPT)   $FW net
  67         Git(ACCEPT)   $FW net
  68         HTTP(ACCEPT)  $FW net
  69         HTTPS(ACCEPT) $FW net
  70         SMTP(ACCEPT)  $FW net
  71         SMTPS(ACCEPT) $FW net
  72         SSH(ACCEPT)   $FW net
  73
  74         # ----------
  75         # net -> $FW
  76         # ----------
  77
  78         # By protocol
  79         Ping(ACCEPT)  net $FW
  80
  81         # By port
  82         #HTTPS(ACCEPT) net $FW
  83         DNS(ACCEPT)    net $FW
  84         IMAPS(ACCEPT)  net $FW
  85         POP3S(ACCEPT)  net $FW
  86         SMTP(ACCEPT)   net $FW
  87         SMTPS(ACCEPT)  net $FW
  88         '';
  89       "macro.Git" = ''
  90         ?FORMAT 2
  91         #ACTION SOURCE  DEST    PROTO   DEST    SOURCE  RATE    USER/
  92         #                               PORT(S) PORT(S) LIMIT   GROUP
  93         PARAM   -       -       tcp     9418
  94         '';
  95     };
  96   };
  97   services.shorewall6 = {
  98     enable  = true;
  99     configs = {
 100       "shorewall6.conf" = ''
 101         ${builtins.readFile "${shorewall6.package}/etc/shorewall6/shorewall6.conf"}
 102         #
 103         ## Custom config
 104         ###
 105         STARTUP_ENABLED=Yes
 106         ZONE2ZONE=2
 107         '';
 108       zones = ''
 109         # DOC: shorewall-zones(5)
 110         fw firewall
 111         '' + unlines (lib.mapAttrsToList (zone: _: "${zone} ipv6") zones6);
 112       interfaces = ''
 113         # DOC: shorewall-interfaces(5)
 114         ?FORMAT 2
 115         '' + unlines (lib.mapAttrsToList (zone: {iface, ...}:
 116           "${zone} ${iface} nosmurfs,tcpflags") zones6);
 117       policy = ''
 118         # DOC: shorewall-policy(5)
 119         $FW all DROP
 120         '' + unlines (lib.mapAttrsToList (zone: _:
 121           "${zone} all DROP none") zones6)
 122         + ''
 123         # XXX: the following policy must be last
 124         all all REJECT none
 125         '';
 126       rules = ''
 127         # DOC: shorewall-rules(5)
 128         #SECTION ALL
 129         #SECTION ESTABLISHED
 130         #SECTION RELATED
 131         ?SECTION NEW
 132         ''
 133         + lib.optionalString (hasAttr "lan" zones6) ''
 134         # ----------
 135         # $FW -> lan
 136         # ----------
 137         Ping(ACCEPT) $FW lan:fe80::/10
 138
 139         # ----------
 140         # lan -> $FW
 141         # ----------
 142         Ping(ACCEPT) lan:fe80::/10 $FW
 143         '';
 144     };
 145   };
 146 };
 147 }