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|
{
config,
lib,
pkgs,
hosts,
...
}: let
cfg = config.collinux.services.networking.sshd;
in {
config = lib.mkIf cfg.enable {
networking.firewall.allowedTCPPorts = [2222]; # only on local network
services.openssh = {
enable = true;
allowSFTP = false;
hostKeys = [
{
path = "/etc/ssh/ssh_host_ed25519_key";
type = "ed25519";
}
];
listenAddresses = [
{
addr = cfg.bind_host;
port = 22;
}
{
addr = cfg.bind_host;
port = 2222;
}
];
settings = {
PermitRootLogin = "no";
PasswordAuthentication = false;
PubkeyAuthentication = true;
KbdInteractiveAuthentication = true; # for google authenticator totp codes
AuthenticationMethods = "publickey,keyboard-interactive:pam";
};
knownHosts = builtins.mapAttrs (_: data: {publicKey = data.host_pubkey;}) hosts;
extraConfig = ''
Match LocalPort 2222
AuthenticationMethods publickey
PermitRootLogin prohibit-password
'';
};
security.pam.services = {
login.googleAuthenticator.enable = true;
sshd.text = ''
account required pam_unix.so # unix (order 10900)
auth required ${pkgs.google-authenticator}/lib/security/pam_google_authenticator.so nullok no_increment_hotp # google_authenticator (order 12500)
auth sufficient pam_permit.so
session required pam_env.so conffile=/etc/pam/environment readenv=0 # env (order 10100)
session required pam_unix.so # unix (order 10200)
session required pam_loginuid.so # loginuid (order 10300)
session optional ${pkgs.systemd}/lib/security/pam_systemd.so # systemd (order 12000)
'';
};
users.users.${config.collinux.user.name}.openssh.authorizedKeys.keys =
hosts
|> (builtins.mapAttrs (_: data: data.user_pubkey or null))
|> builtins.attrValues
|> (builtins.filter (x: x != null));
users.users."root".openssh.authorizedKeys.keys =
if config.services.openssh.settings.PermitRootLogin == "prohibit-password"
then
hosts
|> (builtins.mapAttrs (_: data: data.user_pubkey or null))
|> builtins.attrValues
|> (builtins.filter (x: x != null))
else {};
systemd.services."openssh" = lib.mkIf config.collinux.services.networking.networkd.enable {
after = lib.mkAfter ["network-online.target"];
wants = lib.mkAfter ["network-online.target"];
};
services.tailscale.extraSetFlags = lib.optional config.services.tailscale.enable "--ssh=true";
};
}
|
