# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  # Use the systemd-boot EFI boot loader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking = {  
    hostName = "vm02179";
    domain = "procolix.com";
    interfaces = {
      eth0 = {
        ipv4 = {
          addresses = [
            {
              address = "185.206.232.179";
              prefixLength = 24;
            }
          ];
        };
        ipv6 = {
          addresses = [
            {
              address = "2a00:51c0:12:1201::179";
              prefixLength = 64;
            }
          ];
        };
      };
    };
    defaultGateway = {
      address = "185.206.232.1";
      interface = "eth0";
    };
    defaultGateway6 = {
      address = "2a00:51c0:12:1201::1";
      interface = "eth0";
    };
    nameservers = [ "95.215.185.6" "95.215.185.7" ];
    firewall.enable = false;
    nftables = {
      enable = true;
      ruleset = ''
        #!/usr/sbin/nft -f
      
        flush ruleset
      
        ########### define usefull variables here #####################
        define wan        = eth0
        define ssh_allow  = {
                    83.161.147.127/32, # host801 ipv4
                    95.215.185.92/32,  # host088 ipv4
                    95.215.185.211/32, # host089 ipv4
                    95.215.185.34/32,  # nagios2 ipv4
                    95.215.185.181/32, # ansible.procolix.com
                    95.215.185.235,        # ansible-hq
                }
        define snmp_allow = {
                    95.215.185.31/32,   # cacti ipv4
                }
        define nrpe_allow = {
                    95.215.185.34/32,   # nagios2 ipv4
                }
      
        ########### here starts the automated bit #####################
        table inet filter {
            chain input {
                type filter hook input priority 0; 
                policy drop;
      
                # established/related connections
                ct state established,related accept
                ct state invalid drop
      
                # Limit ping requests.
                ip protocol icmp icmp type echo-request limit rate over 10/second burst 50 packets drop
                ip6 nexthdr icmpv6 icmpv6 type echo-request limit rate over 10/second burst 50 packets drop
      
                # loopback interface
                iifname lo accept
                
                # icmp
                ip protocol icmp icmp type { destination-unreachable, echo-reply, echo-request, source-quench, time-exceeded } accept
                # Without the nd-* ones ipv6 will not work.
                ip6 nexthdr icmpv6 icmpv6 type { destination-unreachable, echo-reply, echo-request, nd-neighbor-solicit,  nd-router-advert, nd-neighbor-advert, packet-too-big, parameter-problem, time-exceeded } accept
      
                # open tcp ports: sshd (22)
                tcp dport {ssh} accept
      
                # open tcp ports: snmp (161)
                ip saddr $snmp_allow udp dport {snmp} accept
      
                # open tcp ports: nrpe (5666)
                ip saddr $nrpe_allow tcp dport {nrpe} accept
      
                # open tcp ports: http (80,443)
                tcp dport {http,https} accept
            }
            chain forward {
                type filter hook forward priority 0;
            }
            chain output {
                type filter hook output priority 0;
            }
        }
      
        table ip nat {
            chain postrouting {
            }   
            chain prerouting {
            }
        }  
      '';
    };
  };


  # Set your time zone.
  time.timeZone = "Europe/Amsterdam";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.root = {
    hashedPassword = "$y$j9T$WXvLAUqArJJusuC017FCW0$.rfMOeyx/BsClkJFi5hLcynrSk.njWmfiB6Uy.9th3A";
    openssh.authorizedKeys.keys = [
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEElREJN0AC7lbp+5X204pQ5r030IbgCllsIxyU3iiKY"
    ];
  };

  users.users.procolix = {
    isNormalUser = true;
    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
    hashedPassword = "$y$j9T$UH8Dh/poTCCZ3PXk43au6/$iYen8VUEVvv7SIPqteNtTPKktLxny3TbqvjUwhvi.6B";
    openssh.authorizedKeys.keys = [
    "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAotfCIjLoDlHOe+++kVS1xiBPaS8mC5FypgrxDrDVst6SHxMTca2+IScMajzUZajenvNAoZOwIsyAPacT8OHeyFvV5Y7G874Qa+cZVqJxLht9gdXxr1GNabU3RfhhCh272dUeIKIqfgsRsM2HzdnZCMDavS1Yo+f+RhhHhnJIua+NdVFo21vPrpsz+Cd0M1NhojARLajrTHvEXW0KskUnkbfgxT0vL9jeRZxdgMS+a9ZoR5dbzOxQHWfbP8N04Xc+7CweMlvKwlWuAE/xDb5XLNHorfGWFvZuVhptJN8jPaaVS25wsmsF5IbaAuSZfzCtBdFQhIloUhy0L6ZisubHjQ== procolix@sshnode1"
    "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAuT3C0f3nyQ7SwUvXcFmEYEgwL+crY6iK0Bhoi9yfn4soz3fhfMKyKSwc/0RIlRnrz3xnkyJiV0vFeU7AC1ixbGCS3T9uc0G1x0Yedd9n2yR8ZJmkdyfjZ5KE4YvqZ3f6UZn5Mtj+7tGmyp+ee+clLSHzsqeyDiX0FIgFmqiiAVJD6qeKPFAHeWz9b2MOXIBIw+fSLOpx0rosCgesOmPc8lgFvo+dMKpSlPkCuGLBPj2ObT4sLjc98NC5z8sNJMu3o5bMbiCDR9JWgx9nKj+NlALwk3Y/nzHSL/DNcnP5vz2zbX2CBKjx6ju0IXh6YKlJJVyMsH9QjwYkgDQVmy8amQ== procolix@sshnode2"
    ];
    packages = with pkgs; [
    ];
  };

  users.users.niols = {
    isNormalUser = true;
    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
    hashedPassword = "$y$j9T$zZZ/XQ68cGr6GTIQqSnsh/$I9UEl9JLxq8kWZbVOp.WqUxfcNmrSVMBGSwGalIJ/Z/";
    openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEElREJN0AC7lbp+5X204pQ5r030IbgCllsIxyU3iiKY niols@wallace"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBkQXv/VRZLfV0wNN9PHedmKWyAIfpPUCdaznHZNIDkS niols@orianne/fediversity"
    ];
    packages = with pkgs; [
    ];
  };

  nix = {
    settings.trusted-users = [ "@wheel" ];
  };

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    (pkgs.vim_configurable.customize {
      name = "vim";
      vimrcConfig.packages.myplugins = with pkgs.vimPlugins; {
        start = [ vim-nix ]; # load plugin on startup
      };
      vimrcConfig.customRC = ''
        " your custom vimrc
        set nocompatible
        set backspace=indent,eol,start
        " Turn on syntax highlighting by default
        syntax on
        " ...
      '';
    })
    wget
  ];

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "24.05"; # Did you read the comment?

}