1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
{
inputs.environment.url = "path:../environment";
inputs.secrets-public.url = "path:../../secrets";
inputs.mypackages.url = "path:../../mypackages";
inputs.myuids.url = "path:../../myuids";
inputs.backports.url = "path:../../backports";
outputs = { self, secrets-public, mypackages, backports, environment, myuids }: {
nixosModule = self.nixosModules.system;
nixosModules.system = { pkgs, lib, config, name, nodes, secrets, options, ... }:
{
imports = [
secrets.nixosModules.users-config-common
environment.nixosModule
secrets-public.nixosModule
];
config = {
myEnv = import secrets.environment-file;
networking.hostName = name;
deployment.keys."vars.yml" = {
keyCommand = [ pkgs.stdenv.shell "-c" "cat ${secrets.vars-file}" ];
user = "root";
group = "root";
permissions = "0400";
};
networking.extraHosts = builtins.concatStringsSep "\n"
(lib.mapAttrsToList (n: v: "${lib.head v.config.hostEnv.ips.main.ip4} ${n}") nodes);
users.extraUsers.root.openssh.authorizedKeys.keys = [ config.myEnv.sshd.rootKeys.nix_repository ];
secrets.deleteSecretsVars = true;
secrets.secretsVars = "/run/keys/vars.yml";
services.openssh.enable = true;
nixpkgs.overlays =
builtins.attrValues mypackages.overlays ++
builtins.attrValues backports.overlays ++
[
(self: super: {
postgresql = self.postgresql_pam;
mariadb = self.mariadb_1011.overrideAttrs(old: {
passthru = old.passthru // { mysqlVersion = "5.7"; };
});
}) # don’t put them as generic overlay because of home-manager
];
services.journald.extraConfig = ''
#Should be "warning" but disabled for now, it prevents anything from being stored
MaxLevelStore=info
MaxRetentionSec=1year
'';
users.groups.acme.gid = myuids.lib.gids.acme;
users.users.acme.uid = myuids.lib.uids.acme;
environment.systemPackages = [
pkgs.inetutils
pkgs.htop
pkgs.iftop
pkgs.bind.dnsutils
pkgs.httpie
pkgs.iptables
pkgs.iotop
pkgs.whois
pkgs.ngrep
pkgs.tcpdump
pkgs.wireshark-cli
pkgs.tcpflow
pkgs.mitmproxy
pkgs.nmap
pkgs.p0f
pkgs.socat
pkgs.lsof
pkgs.psmisc
pkgs.openssl
pkgs.wget
pkgs.pv
pkgs.smartmontools
pkgs.git
pkgs.vim
pkgs.rsync
pkgs.strace
pkgs.sqlite
pkgs.unzip
pkgs.jq
pkgs.yq
];
users.mutableUsers = lib.mkDefault false;
systemd.services."vars.yml-key".enable = lib.mkForce false;
systemd.targets.maintenance = {
description = "Maintenance target with only sshd";
after = [ "network-online.target" "sshd.service" ];
requires = [ "network-online.target" "sshd.service" ];
unitConfig.AllowIsolate = "yes";
};
security.acme.acceptTerms = true;
security.acme.preliminarySelfsigned = true;
security.acme.certs = {
"${name}" = {
domain = config.hostEnv.fqdn;
};
};
security.acme.defaults = {
email = "ismael@bouya.org";
webroot = "/var/lib/acme/acme-challenges";
postRun = builtins.concatStringsSep "\n" [
(lib.optionalString config.services.nginx.enable "systemctl reload nginx.service")
];
extraLegoRenewFlags = [ "--reuse-key" ];
keyType = lib.mkDefault "ec256"; # https://github.com/NixOS/nixpkgs/pull/83121
#extraLegoRunFlags = [ "--reuse-key" "--preferred-chain" "ISRG Root X1"];
#extraLegoRenewFlags = ["--preferred-chain" "ISRG Root X1"];
};
services.nginx = {
recommendedTlsSettings = true;
virtualHosts = {
"${config.hostEnv.fqdn}" = {
acmeRoot = config.security.acme.defaults.webroot;
useACMEHost = name;
forceSSL = true;
};
};
};
services.fail2ban.jails.DEFAULT = {
settings.bantime = lib.mkForce "12h";
settings.findtime = "12h";
};
services.fail2ban = {
enable = true;
#findtime = "12h";
#bantime = "12h";
bantime-increment = {
enable = true; # Enable increment of bantime after each violation
formula = "ban.Time * math.exp(float(ban.Count+1)*banFactor)/math.exp(1*banFactor)";
#multipliers = "1 2 4 8 16 32 64";
maxtime = "168h"; # Do not ban for more than 1 week
overalljails = true; # Calculate the bantime based on all the violations
};
maxretry = 10;
ignoreIP = let
ip4s = lib.flatten (lib.mapAttrsToList (n: v: (lib.mapAttrsToList (n: v: v.ip4 or []) v.ips)) (config.myEnv.servers));
ip6s = lib.flatten (lib.mapAttrsToList (n: v: (lib.mapAttrsToList (n: v: v.ip6 or []) v.ips)) (config.myEnv.servers));
in
ip4s ++ ip6s;
};
};
};
};
}
|
