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|
{
config,
lib,
pkgs,
...
}:
with lib;
let
cfg = config.nixfiles.modules.openssh;
in
{
options.nixfiles.modules.openssh = {
client.enable = mkEnableOption "OpenSSH client";
server = {
enable = mkEnableOption "OpenSSH server";
port = mkOption {
description = "OpenSSH server port.";
type = types.port;
default = 22022; # Port 22 should be occupied by a tarpit.
};
};
};
config = mkMerge [
(mkIf cfg.client.enable {
hm = {
home.packages = with pkgs; [
mosh
sshfs
sshpass
];
programs.ssh = {
enable = true;
hashKnownHosts = true;
controlMaster = "auto";
controlPersist = "24H";
serverAliveCountMax = 30;
serverAliveInterval = 60;
matchBlocks =
let
mkBlock =
name:
{
hostname ? name,
port ? 22022, # NOTE This is not the default OpenSSH port.
user ? my.username,
identityFile ? "${config.my.home}/.ssh/${my.username}_${my.ssh.type}",
extraAttrs ? { },
}:
nameValuePair name (
{
inherit
hostname
port
user
identityFile
;
}
// extraAttrs
);
internalServers = mapAttrs' mkBlock (
mapAttrs (name: _: { hostname = "${name}.${my.domain.shire}"; }) (
filterAttrs (_: attr: hasAttr "wireguard" attr && attr.isHeadless) my.configurations
)
);
in
internalServers
// (mapAttrs' mkBlock {
gitolite = {
user = "git";
hostname = "git.${my.domain.shire}";
};
});
};
};
})
(mkIf cfg.server.enable {
ark.files = [
"/etc/ssh/ssh_host_ed25519_key"
"/etc/ssh/ssh_host_ed25519_key.pub"
"/etc/ssh/ssh_host_rsa_key"
"/etc/ssh/ssh_host_rsa_key.pub"
];
programs.mosh.enable = true;
services = {
openssh = {
enable = true;
ports = [ cfg.server.port ];
settings = {
ClientAliveCountMax = 3;
ClientAliveInterval = 60;
KbdInteractiveAuthentication = false;
LogLevel = if config.nixfiles.modules.fail2ban.enable then "VERBOSE" else "ERROR";
MaxAuthTries = 3;
PasswordAuthentication = false;
PermitRootLogin = mkForce "no";
};
};
fail2ban.jails.sshd = {
enabled = true;
settings = {
mode = "aggressive";
inherit (cfg.server) port;
};
};
};
})
];
}
|
