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1 | { lib, pkgs, config, ... }: | |
2 | { | |
3 | options.myServices.dns.enable = lib.mkEnableOption "enable DNS resolver"; | |
4 | config = let | |
5 | # taken from unstable | |
6 | cartesianProductOfSets = attrsOfLists: with lib; | |
7 | lib.foldl' (listOfAttrs: attrName: | |
8 | concatMap (attrs: | |
9 | map (listValue: attrs // { ${attrName} = listValue; }) attrsOfLists.${attrName} | |
10 | ) listOfAttrs | |
11 | ) [{}] (attrNames attrsOfLists); | |
12 | cfg = config.services.bind; | |
13 | keyIncludes = builtins.concatStringsSep "\n" (map (v: "include \"${config.secrets.fullPaths."bind/${v}.key"}\";") (builtins.attrNames config.myEnv.dns.keys)); | |
14 | cartProduct = lib.foldr | |
15 | (s: servers: servers // { ${s.masters} = lib.unique ((servers.${s.masters} or []) ++ [s.keys]); }) | |
16 | {} | |
17 | (lib.unique (lib.concatMap (z: cartesianProductOfSets { masters = z.masters or []; keys = z.keys or []; }) config.myEnv.dns.slaveZones)); | |
18 | toKeyList = servers: keys: builtins.concatStringsSep "\n" (map (s: '' | |
19 | server ${s} { | |
20 | keys { ${builtins.concatStringsSep ";" keys}; }; | |
21 | }; | |
22 | '') servers); | |
23 | serverIncludes = builtins.concatStringsSep "\n" (lib.mapAttrsToList (n: toKeyList (lib.flatten (builtins.attrValues config.myEnv.dns.ns."${n}"))) cartProduct); | |
24 | configFile = pkgs.writeText "named.conf" '' | |
25 | include "/etc/bind/rndc.key"; | |
26 | controls { | |
27 | inet 127.0.0.1 allow {localhost;} keys {"rndc-key";}; | |
28 | }; | |
29 | ||
30 | acl cachenetworks { ${lib.concatMapStrings (entry: " ${entry}; ") cfg.cacheNetworks} }; | |
31 | acl badnetworks { ${lib.concatMapStrings (entry: " ${entry}; ") cfg.blockedNetworks} }; | |
32 | ||
33 | options { | |
34 | listen-on { ${lib.concatMapStrings (entry: " ${entry}; ") cfg.listenOn} }; | |
35 | listen-on-v6 { ${lib.concatMapStrings (entry: " ${entry}; ") cfg.listenOnIpv6} }; | |
36 | allow-query { cachenetworks; }; | |
37 | blackhole { badnetworks; }; | |
38 | forward first; | |
39 | forwarders { ${lib.concatMapStrings (entry: " ${entry}; ") cfg.forwarders} }; | |
40 | directory "/var/run/named"; | |
41 | pid-file "/var/run/named/named.pid"; | |
42 | ${cfg.extraOptions} | |
43 | }; | |
44 | ||
45 | ${keyIncludes} | |
46 | ${serverIncludes} | |
47 | ||
48 | ${cfg.extraConfig} | |
49 | ||
50 | ${ lib.concatMapStrings | |
51 | ({ name, file, master ? true, extra ? "", slaves ? [], masters ? [] }: | |
52 | '' | |
53 | zone "${name}" { | |
54 | type ${if master then "master" else "slave"}; | |
55 | file "${file}"; | |
56 | ${ if lib.lists.length slaves > 0 then | |
57 | '' | |
58 | allow-transfer { | |
59 | ${lib.concatMapStrings (ip: "${ip};\n") slaves} | |
60 | }; | |
61 | '' else ""} | |
62 | ${ if lib.lists.length masters > 0 then | |
63 | '' | |
64 | masters { | |
65 | ${lib.concatMapStrings (ip: "${ip};\n") masters} | |
66 | }; | |
67 | '' else ""} | |
68 | allow-query { any; }; | |
69 | ${extra} | |
70 | }; | |
71 | '') | |
72 | cfg.zones } | |
73 | ''; | |
74 | mxes = lib.attrsets.filterAttrs | |
75 | (n: v: v.mx.enable) | |
76 | config.myEnv.servers; | |
77 | ip4mxes = builtins.concatStringsSep "\n" (lib.mapAttrsToList | |
78 | (n: v: builtins.concatStringsSep "\n" (map (i: "${v.mx.subdomain} IN A ${i}") v.ips.main.ip4)) | |
79 | mxes); | |
80 | ip6mxes = builtins.concatStringsSep "\n" (lib.mapAttrsToList | |
81 | (n: v: builtins.concatStringsSep "\n" (map (i: "${v.mx.subdomain} IN AAAA ${i}") v.ips.main.ip6)) | |
82 | mxes); | |
83 | mxmxes = n: conf: builtins.concatStringsSep "\n" (lib.mapAttrsToList | |
84 | (_: v: "${n} IN MX ${v.mx.priority} ${v.mx.subdomain}.${conf.name}.") | |
85 | mxes); | |
86 | in lib.mkIf config.myServices.dns.enable { | |
87 | networking.firewall.allowedUDPPorts = [ 53 ]; | |
88 | networking.firewall.allowedTCPPorts = [ 53 ]; | |
89 | users.users.named.extraGroups = [ "keys" ]; | |
90 | secrets.keys = lib.mapAttrs' (k: v: | |
91 | lib.nameValuePair "bind/${k}.key" { | |
92 | permissions = "0400"; | |
93 | user = "named"; | |
94 | text = '' | |
95 | key "${k}" | |
96 | { | |
97 | algorithm ${v.algorithm}; | |
98 | secret "${v.secret}"; | |
99 | }; | |
100 | ''; | |
101 | } | |
102 | ) config.myEnv.dns.keys; | |
103 | services.bind = { | |
104 | enable = true; | |
105 | cacheNetworks = ["any"]; | |
106 | configFile = configFile; | |
107 | extraOptions = '' | |
108 | allow-recursion { 127.0.0.1; }; | |
109 | allow-transfer { none; }; | |
110 | ||
111 | notify-source ${lib.head config.myEnv.servers.eldiron.ips.main.ip4}; | |
112 | notify-source-v6 ${lib.head config.myEnv.servers.eldiron.ips.main.ip6}; | |
113 | version none; | |
114 | hostname none; | |
115 | server-id none; | |
116 | ''; | |
117 | zones = with config.myEnv.dns; | |
118 | assert (builtins.substring ((builtins.stringLength soa.email)-1) 1 soa.email) != "."; | |
119 | assert (builtins.substring ((builtins.stringLength soa.primary)-1) 1 soa.primary) != "."; | |
120 | (map (conf: { | |
121 | name = conf.name; | |
122 | master = false; | |
123 | file = "/var/run/named/${conf.name}.zone"; | |
124 | masters = if lib.attrsets.hasAttr "masters" conf | |
125 | then lib.lists.flatten (map (n: lib.attrsets.attrValues ns.${n}) conf.masters) | |
126 | else []; | |
127 | }) slaveZones) | |
128 | ++ (map (conf: { | |
129 | name = conf.name; | |
130 | master = true; | |
131 | extra = if lib.attrsets.hasAttr "extra" conf then conf.extra else ""; | |
132 | slaves = if lib.attrsets.hasAttr "slaves" conf | |
133 | then lib.lists.flatten (map (n: lib.attrsets.attrValues ns.${n}) conf.slaves) | |
134 | else []; | |
135 | file = pkgs.writeText "${conf.name}.zone" '' | |
136 | $TTL 10800 | |
137 | @ IN SOA ${soa.primary}. ${builtins.replaceStrings ["@"] ["."] soa.email}. ${soa.serial} ${soa.refresh} ${soa.retry} ${soa.expire} ${soa.ttl} | |
138 | ||
139 | ${lib.concatStringsSep "\n" (map (x: "@ IN NS ${x}.") (lib.concatMap (n: lib.attrsets.mapAttrsToList (k: v: k) ns.${n}) conf.ns))} | |
140 | ${lib.optionalString (conf.withCAA != null) '' | |
141 | ${conf.name}. IN CAA 0 issue "${conf.withCAA}" | |
142 | ''} | |
143 | ||
144 | ${conf.entries} | |
145 | ||
146 | ${if lib.attrsets.hasAttr "withEmail" conf && lib.lists.length conf.withEmail > 0 then '' | |
147 | ${ip4mxes} | |
148 | ${ip6mxes} | |
149 | ${lib.concatStringsSep "\n\n" (map (e: | |
150 | let | |
151 | n = if e.domain == "" then "@" else "${e.domain} "; | |
152 | suffix = if e.domain == "" then "" else ".${e.domain}"; | |
153 | in | |
154 | '' | |
155 | ; ------------------ mail: ${n} --------------------------- | |
156 | ${mxmxes n conf} | |
157 | ||
158 | ; https://tools.ietf.org/html/rfc6186 | |
159 | _submission._tcp${suffix} SRV 0 1 587 smtp.immae.eu. | |
160 | _submissions._tcp${suffix} SRV 0 1 465 smtp.immae.eu. | |
161 | _imap._tcp${suffix} SRV 0 1 143 imap.immae.eu. | |
162 | _imaps._tcp${suffix} SRV 0 1 993 imap.immae.eu. | |
163 | _pop3._tcp${suffix} SRV 10 1 110 pop3.immae.eu. | |
164 | _pop3s._tcp${suffix} SRV 10 1 995 pop3.immae.eu. | |
165 | _sieve._tcp${suffix} SRV 0 1 4190 imap.immae.eu. | |
166 | ||
167 | ; MTA-STS | |
168 | ; https://blog.delouw.ch/2018/12/16/using-mta-sts-to-enhance-email-transport-security-and-privacy/ | |
169 | ; https://support.google.com/a/answer/9261504 | |
170 | _mta-sts${suffix} IN TXT "v=STSv1;id=20200109150200Z" | |
171 | _smtp._tls${suffix} IN TXT "v=TLSRPTv1;rua=mailto:postmaster+mta-sts@immae.eu" | |
172 | ${builtins.concatStringsSep "\n" (map (i: "mta-sts${suffix} IN A ${i}") config.myEnv.servers.eldiron.ips.main.ip4)} | |
173 | ${builtins.concatStringsSep "\n" (map (i: "mta-sts${suffix} IN AAAA ${i}") config.myEnv.servers.eldiron.ips.main.ip6)} | |
174 | ||
175 | ; Mail sender authentications | |
176 | ${n} IN TXT "v=spf1 mx ~all" | |
177 | _dmarc${suffix} IN TXT "v=DMARC1; p=none; adkim=r; aspf=r; fo=1; rua=mailto:postmaster+rua@immae.eu; ruf=mailto:postmaster+ruf@immae.eu;" | |
178 | ${if e.send then '' | |
179 | immae_eu._domainkey${suffix} IN TXT ( "v=DKIM1; k=rsa; s=email; " | |
180 | "p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzl3vLd8W5YAuumC5+ZT9OV7/14Pmh5JYtwyqKI3cfe9NnAqInt3xO4bZ7oqIxRKWN4SD39vm7O/QOvFdBt00ENOOzdP90s5gKw6eIP/4+vPTh0IWltAsmu9B2agzdtWUE7t2xFKIzEn8l9niRE2QYbVaqZv4sub98vY55fIgFoHtjkmNC7325S8fjDJGp6OPbyhAs6Xl5/adjF" | |
181 | "0ko4Y2p6RaxLQfjlS0bxmK4Qg6C14pIXHtzVeqOuWrwApqt5+AULSn97iUtqV/IJlEEjC6DUR44t3C/G0G/k46iFclCqRRi0hdPrOHCtZDbtMubnTN9eaUiNpkXh1WnCflHwtjQwIDAQAB" ) | |
182 | eldiron._domainkey${suffix} IN TXT ${config.myEnv.mail.dkim.eldiron.public} | |
183 | '' else ""} | |
184 | '') conf.withEmail)} | |
185 | '' + (if conf.name == "immae.eu" then '' | |
186 | ; ----------------- Accept DMARC reports ------------------- | |
187 | ${lib.concatStringsSep "\n" ( | |
188 | lib.flatten ( | |
189 | map (z: map (e: "${e.domain}${if builtins.stringLength e.domain > 0 then "." else ""}${z.name}._report._dmarc IN TXT \"v=DMARC1;\"") (z.withEmail or [])) masterZones | |
190 | ) | |
191 | )} | |
192 | '' else "") else ""} | |
193 | ''; | |
194 | }) masterZones); | |
195 | }; | |
196 | }; | |
197 | } |