1 files changed, 41 insertions, 0 deletions
diff --git a/nix/machines/common/network.nix b/nix/machines/common/network.nix
new file mode 100644
index 0000000..fb31099
--- /dev/null
+++ b/nix/machines/common/network.nix
@@ -0,0 +1,41 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+{
+  networking.firewall.allowPing = true;
+
+  # Default to systemd-networkd usage.
+  networking.useNetworkd = lib.mkDefault true;
+  systemd.network.wait-online.anyInterface = lib.mkDefault config.networking.useDHCP;
+
+  # Use systemd-resolved for DoT support.
+  services.resolved = {
+    enable = true;
+    dnssec = "false";
+    extraConfig = ''
+      DNSOverTLS=yes
+    '';
+  };
+
+  # Used by systemd-resolved, not directly by resolv.conf.
+  networking.nameservers = [
+    "8.8.8.8#dns.google"
+    "1.0.0.1#cloudflare-dns.com"
+  ];
+
+  networking.firewall.logRefusedConnections = false;
+
+  boot.kernel.sysctl = {
+    "net.ipv4.tcp_fastopen" = 3;
+    "net.ipv4.tcp_tw_reuse" = 1;
+  };
+
+  environment.systemPackages = with pkgs; [
+    mtr
+    tcpdump
+    traceroute
+  ];
+}