73 lines
1.9 KiB
Nix
73 lines
1.9 KiB
Nix
{ pkgs, config, lib, ... }:
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with lib;
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with types;
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let
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defaultRootKeyFiles = [ (toString ../../../assets/ssh/palo_rsa.pub) ];
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cfg = config.components.network.sshd;
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in
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{
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imports = [
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./known-hosts-bootup.nix
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./known-hosts-private.nix
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./known-hosts-public.nix
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];
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options.components.network.sshd = {
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enable = mkOption {
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type = bool;
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default = true;
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};
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rootKeyFiles = mkOption {
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type = with types; listOf path;
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default = [ ];
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description = "keys to root login";
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};
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onlyTincAccess = mkOption {
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type = bool;
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default = false;
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description = ''
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make sure ssh is only available trough the tinc
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'';
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};
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};
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config = mkMerge [
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(mkIf cfg.enable {
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environment.systemPackages = [ pkgs.sshfs ];
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services.openssh = {
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enable = true;
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settings.X11Forwarding = false;
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settings.PasswordAuthentication = false;
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};
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users.users.root.openssh.authorizedKeys.keyFiles = cfg.rootKeyFiles ++ defaultRootKeyFiles;
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services.openssh.extraConfig = ''
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Banner /etc/ssh/banner-line
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'';
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environment.etc."ssh/banner-line".text =
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let
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text = config.networking.hostName;
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size = 80 - (lib.stringLength text);
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space = lib.fixedWidthString size " " "";
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in
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''
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────────────────────────────────────────────────────────────────────────────────
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${space}${text}
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'';
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})
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(mkIf (cfg.onlyTincAccess && cfg.enable) {
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networking.firewall.extraCommands = ''
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iptables --table nat --append PREROUTING ! --in-interface tinc.+ --protocol tcp --match tcp --dport 22 --jump REDIRECT --to-ports 0
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'';
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})
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];
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}
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