diff --git a/Dockerfile b/Dockerfile
index 4319d0d..0e6db71 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,10 @@ ENV QEMU_RAM=1024M
 ENV QEMU_DISK_SIZE=16G
 ENV QEMU_DISK_FORMAT=qcow2
 ENV QEMU_KEYBOARD=en-us
+ENV QEMU_NET_DEVICE=rtl8139
+ENV QEMU_NET_OPTIONS=hostfwd=tcp::13389-:3389,hostfwd=tcp::15900-:5900
+ENV QEMU_BOOT_ORDER=cd
+ENV QEMU_BOOT_MENU=off
 ENV QEMU_KVM=false
 
 # Install system packages
@@ -42,7 +46,10 @@ COPY --chown=root:root scripts/service/ /etc/service/
 # Copy scripts
 COPY --chown=root:root scripts/bin/ /usr/local/bin/
 
-# Expose noVNC port
+# Expose ports
+## VNC
+EXPOSE 5900/tcp
+## noVNC
 EXPOSE 6080/tcp
 
 CMD ["/usr/local/bin/docker-foreground-cmd"]
diff --git a/README.md b/README.md
index 6acfeeb..81f4192 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,15 @@ VM disk format (`qcow2` by default).
 #### `QEMU_KEYBOARD`
 VM keyboard layout (`en-us` by default).
 
+#### `QEMU_NET_DEVICE`
+VM network device (`rtl8139` by default).
+
+#### `QEMU_BOOT_ORDER`
+VM boot order (`cd` by default).
+
+#### `QEMU_BOOT_MENU`
+VM boot menu (`off` by default).
+
 #### `QEMU_KVM`
 Start QEMU in KVM mode (`false` by default).
 > The `--privileged` option is required to use KVM in the container.
diff --git a/scripts/service/qemu/run b/scripts/service/qemu/run
index 09f8acb..10c5a99 100755
--- a/scripts/service/qemu/run
+++ b/scripts/service/qemu/run
@@ -7,8 +7,8 @@ QEMU_ARGS="${QEMU_ARGS-} -smp ${QEMU_CPU} -m ${QEMU_RAM}"
 QEMU_ARGS="${QEMU_ARGS-} -vga std -display vnc=:0"
 QEMU_ARGS="${QEMU_ARGS-} -drive file=/var/lib/qemu/images/reactos.img,index=0,media=disk,format=${QEMU_DISK_FORMAT}"
 QEMU_ARGS="${QEMU_ARGS-} -drive file=/var/lib/qemu/iso/reactos.iso,index=2,media=cdrom,format=raw"
-QEMU_ARGS="${QEMU_ARGS-} -boot order=cd,menu=on,splash-time=5000"
-QEMU_ARGS="${QEMU_ARGS-} -netdev user,id=n0,hostfwd=tcp::13389-:3389,hostfwd=tcp::15900-:5900 -device rtl8139,netdev=n0"
+QEMU_ARGS="${QEMU_ARGS-} -boot order=${QEMU_BOOT_ORDER},menu=${QEMU_BOOT_MENU},splash-time=5000"
+QEMU_ARGS="${QEMU_ARGS-} -netdev user,id=n0,${QEMU_NET_OPTIONS} -device ${QEMU_NET_DEVICE},netdev=n0"
 QEMU_ARGS="${QEMU_ARGS-} -usb -device usb-tablet"
 QEMU_ARGS="${QEMU_ARGS-} -k ${QEMU_KEYBOARD}"
 if [ "${QEMU_KVM}" = true ]; then QEMU_ARGS="${QEMU_ARGS-} -enable-kvm"; fi