diff --git a/README.md b/README.md
index ec6f426..0b8c428 100644
--- a/README.md
+++ b/README.md
@@ -55,21 +55,22 @@ chroot_exec rc-update add example_daemon default
 The following variables can be used to modify the base behaviour of the image 
 builder.
 
-| Variable              | Default Value                        | Description                                                                                       |
-| --------------------- | ------------------------------------ | ------------------------------------------------------------------------------------------------- |
-| ALPINE_BRANCH         | 3.10                                 | [Alpine Branch](https://wiki.alpinelinux.org/wiki/Alpine_Linux:Releases) to use for image         |
-| ALPINE_MIRROR         | http://dl-cdn.alpinelinux.org/alpine | Mirror used for package download                                                                  |
-| CUSTOM_IMAGE_SCRIPT   | image.sh                             | Name of script for image customizations (relative to input dir)                                   |
-| DEFAULT_HOSTNAME      | alpine                               | Default hostname                                                                                  |
-| DEFAULT_ROOT_PASSWORD | alpine                               | Default password for root user                                                                    |
-| DEFAULT_TIMEZONE      | Etc/UTC                              | Default [Timezone](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) to use for image |
-| IMG_NAME              | sdcard                               | Base name of created image file                                                                   |
-| INPUT_PATH            | /input                               | Input directory inside container                                                                  |
-| OUTPUT_PATH           | /output                              | Output directory inside container                                                                 |
-| SIZE_BOOT             | 100M                                 | Size of boot partition                                                                            |
-| SIZE_DATA             | 20M                                  | Initial Size of data partition                                                                    |
-| SIZE_ROOT_FS          | 200M                                 | Size of root file system                                                                          |
-| SIZE_ROOT_PART        | 500M                                 | Size of root partition                                                                            |
+| Variable                 | Default Value                        | Description                                                                                       |
+| ------------------------ | ------------------------------------ | ------------------------------------------------------------------------------------------------- |
+| ALPINE_BRANCH            | 3.10                                 | [Alpine Branch](https://wiki.alpinelinux.org/wiki/Alpine_Linux:Releases) to use for image         |
+| ALPINE_MIRROR            | http://dl-cdn.alpinelinux.org/alpine | Mirror used for package download                                                                  |
+| CUSTOM_IMAGE_SCRIPT      | image.sh                             | Name of script for image customizations (relative to input dir)                                   |
+| DEFAULT_DROPBEAR_ENABLED | true                                 | True to enable SSH server by default                                                              |
+| DEFAULT_HOSTNAME         | alpine                               | Default hostname                                                                                  |
+| DEFAULT_ROOT_PASSWORD    | alpine                               | Default password for root user                                                                    |
+| DEFAULT_TIMEZONE         | Etc/UTC                              | Default [Timezone](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) to use for image |
+| IMG_NAME                 | sdcard                               | Base name of created image file                                                                   |
+| INPUT_PATH               | /input                               | Input directory inside container                                                                  |
+| OUTPUT_PATH              | /output                              | Output directory inside container                                                                 |
+| SIZE_BOOT                | 100M                                 | Size of boot partition                                                                            |
+| SIZE_DATA                | 20M                                  | Initial Size of data partition                                                                    |
+| SIZE_ROOT_FS             | 200M                                 | Size of root file system                                                                          |
+| SIZE_ROOT_PART           | 500M                                 | Size of root partition                                                                            |
 
 ### Update running system
 
diff --git a/resources/build.sh b/resources/build.sh
index 902c0a2..9d5eaf1 100755
--- a/resources/build.sh
+++ b/resources/build.sh
@@ -10,6 +10,7 @@ set -e
 : ${DEFAULT_TIMEZONE:="Etc/UTC"}
 : ${DEFAULT_HOSTNAME:="alpine"}
 : ${DEFAULT_ROOT_PASSWORD:="alpine"}
+: ${DEFAULT_DROPBEAR_ENABLED:="true"}
 
 : ${SIZE_BOOT:="100M"}
 : ${SIZE_ROOT_FS:="200M"}
@@ -166,7 +167,6 @@ chmod +x ${ROOTFS_PATH}/etc/local.d/99-uboot.start
 cp ${RES_PATH}/scripts/* ${ROOTFS_PATH}/sbin/
 
 
-# TODO configurable
 # dropbear
 chroot_exec apk add dropbear
 chroot_exec rc-update add dropbear
@@ -175,6 +175,10 @@ ln -s /data/etc/dropbear/ ${ROOTFS_PATH}/etc/dropbear
 mv ${ROOTFS_PATH}/etc/conf.d/dropbear ${ROOTFS_PATH}/etc/conf.d/dropbear_org
 ln -s /data/etc/dropbear/dropbear.conf ${ROOTFS_PATH}/etc/conf.d/dropbear
 
+if [ "$DEFAULT_DROPBEAR_ENABLED" = "true" ]; then
+  echo 'DROPBEAR_OPTS="-p 127.0.0.1:22"' > ${ROOTFS_PATH}/etc/conf.d/dropbear_org
+fi
+
 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
 echo ">> Move persistent data to /data"