diff --git a/nixos/modules/myFlake/default.nix b/nixos/modules/myFlake/default.nix
index 01ead29..e1e327f 100644
--- a/nixos/modules/myFlake/default.nix
+++ b/nixos/modules/myFlake/default.nix
@@ -2,6 +2,5 @@
   imports = [
     ./boot
     ./hardware
-    ./networking
   ];
 }
diff --git a/nixos/modules/myFlake/networking/default.nix b/nixos/modules/myFlake/networking/default.nix
deleted file mode 100755
index 2bd89dc..0000000
--- a/nixos/modules/myFlake/networking/default.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{...}: {
-  imports = [
-    ./dns.nix
-    ./network-configuration-daemon.nix
-  ];
-}
diff --git a/nixos/modules/myFlake/networking/dns.nix b/nixos/modules/myFlake/networking/dns.nix
deleted file mode 100644
index 7e0d176..0000000
--- a/nixos/modules/myFlake/networking/dns.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-{
-  lib,
-  config,
-  ...
-}: let
-  cfg = config.myFlake.networking.dns;
-in {
-  options = {
-    myFlake.networking.dns = {
-      provider = lib.mkOption {
-        type = lib.types.enum ["dhcp" "google" "alidns"];
-        default =
-          {
-            "Asia/Shanghai" = "alidns";
-          }
-          .${config.time.timeZone}
-          or "google";
-        example = "alidns";
-        description = "Select desired DNS provider.";
-      };
-    };
-  };
-
-  config = {
-    networking.nameservers =
-      {
-        dhcp = [];
-        google = [
-          ### Google DNS
-          "8.8.8.8"
-          "8.8.4.4"
-          "2001:4860:4860::8888"
-          "2001:4860:4860::8844"
-        ];
-        alidns = [
-          ### AliDNS
-          "223.5.5.5"
-          "223.6.6.6"
-          "2400:3200::1"
-          "2400:3200:baba::1"
-        ];
-      }
-      .${cfg.provider};
-  };
-}
diff --git a/nixos/modules/myFlake/networking/network-configuration-daemon.nix b/nixos/modules/myFlake/networking/network-configuration-daemon.nix
deleted file mode 100644
index 49ecb22..0000000
--- a/nixos/modules/myFlake/networking/network-configuration-daemon.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-  lib,
-  config,
-  ...
-}: let
-  cfg = config.myFlake.networking;
-in {
-  options = {
-    myFlake = {
-      networking = {
-        network-configuration-daemon = lib.mkOption {
-          type = lib.types.enum ["iwd" "networkmanager" "networkmanager-iwd"];
-          default = "iwd";
-          example = "networkmanager";
-          description = "Select desired network configuration daemon.";
-        };
-      };
-    };
-  };
-
-  config = lib.mkMerge [
-    (lib.mkIf (cfg.network-configuration-daemon == "iwd") {
-      networking.wireless.iwd.enable = true;
-    })
-    (lib.mkIf (cfg.network-configuration-daemon == "networkmanager" || cfg.network-configuration-daemon == "networkmanager-iwd") {
-      networking.networkmanager = {
-        enable = true;
-        ethernet.macAddress = "random";
-        wifi.macAddress = "random";
-      };
-    })
-    (lib.mkIf (cfg.network-configuration-daemon == "networkmanager-iwd") {
-      networking.wireless.iwd.enable = true;
-      networking.networkmanager.wifi.backend = "iwd";
-    })
-  ];
-}
diff --git a/nixos/profiles/core/default.nix b/nixos/profiles/core/default.nix
index 758a4d4..072291e 100644
--- a/nixos/profiles/core/default.nix
+++ b/nixos/profiles/core/default.nix
@@ -7,6 +7,7 @@
 }: {
   imports = [
     ./hardening
+    ./networking
     ./nix
     ./packages
 
@@ -82,18 +83,4 @@
   #               this shouldn't affect non-nvidia machines.
   nixpkgs.config.nvidia.acceptLicense = true;
   hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.legacy_470;
-
-  ### https://wiki.archlinux.org/title/Sysctl#Improving_performance
-  boot.kernelModules = ["tcp_bbr"];
-  boot.kernel.sysctl = {
-    "net.ipv4.tcp_fastopen" = "3";
-
-    "net.ipv4.tcp_keepalive_time" = "80";
-    "net.ipv4.tcp_keepalive_intvl" = "10";
-    "net.ipv4.tcp_keepalive_probes" = "6";
-    "net.ipv4.tcp_mtu_probing" = "1";
-
-    "net.core.default_qdisc" = "cake";
-    "net.ipv4.tcp_congestion_control" = "bbr";
-  };
 }
diff --git a/nixos/profiles/core/networking/default.nix b/nixos/profiles/core/networking/default.nix
new file mode 100644
index 0000000..fc18e36
--- /dev/null
+++ b/nixos/profiles/core/networking/default.nix
@@ -0,0 +1,38 @@
+_: {
+  networking.wireless.iwd.enable = true;
+  networking.nameservers = [
+    ### Google DNS
+    "8.8.8.8#dns.google"
+    "8.8.4.4#dns.google"
+    "2001:4860:4860::8888#dns.google"
+    "2001:4860:4860::8844#dns.google"
+  ];
+
+  ### systemd-resolved
+  services.resolved = {
+    enable = true;
+    domains = ["~."];
+    dnssec = "true";
+    extraConfig = "DNSOverTLS=yes";
+    fallbackDns = [
+      #"8.8.8.8#dns.google"
+      #"8.8.4.4#dns.google"
+      #"2001:4860:4860::8888#dns.google"
+      #"2001:4860:4860::8844#dns.google"
+    ];
+  };
+
+  ### https://wiki.archlinux.org/title/Sysctl#Improving_performance
+  boot.kernelModules = ["tcp_bbr"];
+  boot.kernel.sysctl = {
+    "net.ipv4.tcp_fastopen" = "3";
+
+    "net.ipv4.tcp_keepalive_time" = "80";
+    "net.ipv4.tcp_keepalive_intvl" = "10";
+    "net.ipv4.tcp_keepalive_probes" = "6";
+    "net.ipv4.tcp_mtu_probing" = "1";
+
+    "net.core.default_qdisc" = "cake";
+    "net.ipv4.tcp_congestion_control" = "bbr";
+  };
+}
diff --git a/nixos/profiles/opt-in/systemd-resolved.nix b/nixos/profiles/opt-in/systemd-resolved.nix
deleted file mode 100644
index a749cb3..0000000
--- a/nixos/profiles/opt-in/systemd-resolved.nix
+++ /dev/null
@@ -1,18 +0,0 @@
-_: {
-  ### systemd-resolved
-  services.resolved = {
-    enable = true;
-    dnssec = "true";
-    domains = ["~."];
-    fallbackDns = [
-      "8.8.8.8#dns.google"
-      "8.8.4.4#dns.google"
-      "2001:4860:4860::8888#dns.google"
-      "2001:4860:4860::8844#dns.google"
-    ];
-    extraConfig = "DNSOverTLS=yes";
-  };
-
-  ### NetworkManager integration
-  networking.networkmanager.dns = "systemd-resolved";
-}