diff --git a/home/program/bash/module/Transmission.sh b/home/program/bash/module/Transmission.sh
new file mode 100644
index 0000000..3a3466c
--- /dev/null
+++ b/home/program/bash/module/Transmission.sh
@@ -0,0 +1,15 @@
+# Torrent download alias.
+function tdl() {
+	transmission-remote home.local ${@}
+}
+
+# Download torrent files to home.
+# Usage: tdla <FILES>
+function tdla() {
+	tdl -a "${@}"
+}
+
+# List download torrents.
+function tdll() {
+	transmission-remote home.local -l
+}
diff --git a/host/x86_64-linux/home/Bind.nix b/host/x86_64-linux/home/Bind.nix
index f86721b..ba8bceb 100644
--- a/host/x86_64-linux/home/Bind.nix
+++ b/host/x86_64-linux/home/Bind.nix
@@ -6,7 +6,6 @@ let
     (mkBind "change" "/var/lib/changedetection-io")
     (mkBind "cups" "/var/lib/cups")
     (mkBind "davis" "/var/lib/davis")
-    (mkBind "deluge" "/var/lib/deluge/.config/deluge")
     (mkBind "dkim" "/var/dkim")
     (mkBind "dovecot_index" "/var/lib/dovecot/indices")
     (mkBind "forgejo" "/var/lib/forgejo")
@@ -24,6 +23,7 @@ let
     (mkBind "sieve" "/var/sieve")
     (mkBind "tandoor" "/var/lib/tandoor-recipes")
     (mkBind "terraria" "/var/lib/terraria")
+    (mkBind "transmission" "/var/lib/transmission")
     (mkBind "uptime_kuma" "/var/lib/uptime-kuma")
     (mkBind "vaultwarden" "/var/lib/vaultwarden")
     (mkBind "vmail" "/var/vmail")
diff --git a/host/x86_64-linux/home/Deluge.nix b/host/x86_64-linux/home/Deluge.nix
deleted file mode 100644
index c36529b..0000000
--- a/host/x86_64-linux/home/Deluge.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{ lib, ... }:
-{
-  services.deluge = {
-    enable = true;
-    web.enable = true;
-  };
-  systemd.services.deluged.serviceConfig = {
-    MemoryMax = "4G";
-    Restart = lib.mkForce "always";
-    RuntimeMaxSec = "3h";
-  };
-}
diff --git a/host/x86_64-linux/home/Network.nix b/host/x86_64-linux/home/Network.nix
index 23bf3c0..3b1e000 100644
--- a/host/x86_64-linux/home/Network.nix
+++ b/host/x86_64-linux/home/Network.nix
@@ -161,10 +161,8 @@ in
         ip46tables -I INPUT -j ACCEPT -i ${wan} -p tcp --dport 443
 
         # Deluge torrenting ports.
-        ip46tables -I INPUT -j ACCEPT -i ${wan} -p tcp --dport 54630
-        ip46tables -I INPUT -j ACCEPT -i ${wan} -p udp --dport 54630
-        ip46tables -I INPUT -j ACCEPT -i ${wan} -p tcp --dport 54631
-        ip46tables -I INPUT -j ACCEPT -i ${wan} -p udp --dport 54631
+        ip46tables -I INPUT -j ACCEPT -i ${wan} -p tcp --dport 51413
+        ip46tables -I INPUT -j ACCEPT -i ${wan} -p udp --dport 51413
 
         # Terraria server.
         ip46tables -I INPUT -j ACCEPT -i ${wan} -p tcp --dport 22777
diff --git a/host/x86_64-linux/home/Transmission.nix b/host/x86_64-linux/home/Transmission.nix
new file mode 100644
index 0000000..d806bfe
--- /dev/null
+++ b/host/x86_64-linux/home/Transmission.nix
@@ -0,0 +1,45 @@
+{ pkgs, ... }: {
+  services.transmission = {
+    enable = true;
+    package = pkgs.transmission_4;
+    # REF: https://github.com/transmission/transmission/blob/main/docs/Editing-Configuration-Files.md
+    settings = let
+      downloadDir = "/storage/hot/download";
+    in
+    {
+      bind-address-ipv4 = "0.0.0.0";
+      bind-address-ipv6 = "::";
+      cache-size-mb = 4;
+      dht-enabled = true;
+      download-dir = downloadDir;
+      download-queue-enabled = true;
+      download-queue-size = 10;
+      encryption = 1;
+      incomplete-dir-enabled = false;
+      message-level = 3;
+      peer-limit-global = 500;
+      peer-limit-per-torrent = 50;
+      peer-port = 51413;
+      pex-enabled = true;
+      port-forwarding-enabled = false;
+      preallocation = 1;
+      preferred-transport = "utp";
+      rename-partial-files = true;
+      rpc-bind-address = "::";
+      rpc-host-whitelist-enabled = false;
+      rpc-password = "";
+      rpc-port = 9091;
+      rpc-username = "root";
+      rpc-whitelist-enabled = false;
+      start-added-torrents = true;
+      tcp-enabled = true;
+      torrent-added-verify-mode = "fast";
+      trash-can-enabled = false;
+      trash-original-torrent-files = true;
+      umask = 22;
+      utp-enabled = true;
+      watch-dir = "/var/lib/transmission/watchdir/";
+      watch-dir-enabled = true;
+    };
+  };
+}
diff --git a/host/x86_64-linux/home/nginx/Deluge.nix b/host/x86_64-linux/home/nginx/Transmission.nix
similarity index 80%
rename from host/x86_64-linux/home/nginx/Deluge.nix
rename to host/x86_64-linux/home/nginx/Transmission.nix
index 67a05e9..3e7bd56 100644
--- a/host/x86_64-linux/home/nginx/Deluge.nix
+++ b/host/x86_64-linux/home/nginx/Transmission.nix
@@ -6,7 +6,7 @@ in
   "download.${cfg.domain}" = {
     inherit (cfg) sslCertificate sslCertificateKey extraConfig;
     locations."/" = {
-      proxyPass = "http://127.0.0.1:8112$request_uri";
+      proxyPass = "http://[::1]:9091$request_uri";
       extraConfig = cfg.allowLocal;
     };
   };
diff --git a/package/default.nix b/package/default.nix
index d5ed873..9e7bc31 100644
--- a/package/default.nix
+++ b/package/default.nix
@@ -102,6 +102,7 @@
     swappy # Screenshot editing.
     sway # Sway WM.
     swaykbdd # Keyboard layout per-window.
+    transmission_4 # Torrent client.
     waybar # Sway bar.
     wf-recorder # Screen recording.