diff --git a/arpspoof/Readme.md b/arpspoof/Readme.md
index 0f0cc15e6..6d0adabdf 100644
--- a/arpspoof/Readme.md
+++ b/arpspoof/Readme.md
@@ -17,6 +17,8 @@ _Thanks to everyone having starred my repo! To star it click on the image below,
 [arpspoof](https://github.com/t0mer/Arpspoof-Docker) adds ability to block internet connection for local network devices
 This addon is based on the docker image https://hub.docker.com/r/techblog/arpspoof-docker
 
+See all informations here : https://en.techblog.co.il/2021/03/15/home-assistant-cut-internet-connection-using-arpspoof/
+
 ## Installation
 
 The installation of this add-on is pretty straightforward and not different in comparison to installing any other add-on.
@@ -37,7 +39,7 @@ Webui can be found at <http://your-ip:PORT>.
 
 ```yaml
 ROUTER_IP: 127.0.0.1 #Required Router IP
-INTERFACE_NAME: name #Required Interface name, can use this command to get it: ip route get 8.8.8.8 | sed -nr 's/.*dev ([^\ ]+).*/\1/p'
+INTERFACE_NAME: name #Required Interface name. Autofilled if empty.
 ```
 
 ## Support
diff --git a/arpspoof/config.json b/arpspoof/config.json
index dbd38e118..fd32f288d 100644
--- a/arpspoof/config.json
+++ b/arpspoof/config.json
@@ -11,8 +11,7 @@
   "host_network": true,
   "name": "Arpspoof",
   "options": {
-    "ROUTER_IP": "yourip",
-    "INTERFACE_NAME": "interface name"
+    "ROUTER_IP": "yourip"
   },
   "ports": {
     "7022/tcp": 7022
@@ -23,7 +22,7 @@
   "privileged": ["SYS_ADMIN", "DAC_READ_SEARCH"],
   "schema": {
     "ROUTER_IP": "str",
-    "INTERFACE_NAME": "str"
+    "INTERFACE_NAME": "str?"
   },
   "slug": "arpspoof",
   "upstream": "1.0",
diff --git a/arpspoof/rootfs/scripts/99-run.sh b/arpspoof/rootfs/scripts/99-run.sh
index 58a8ddd23..9011010d1 100644
--- a/arpspoof/rootfs/scripts/99-run.sh
+++ b/arpspoof/rootfs/scripts/99-run.sh
@@ -1,4 +1,10 @@
 #!/usr/bin/env bashio
 
+# Autodefine if not defined
+if [ -z INTERFACE_NAME ]; then
+INTERFACE_NAME=$(ip route get 8.8.8.8 | sed -nr 's/.*dev ([^\ ]+).*/\1/p')
+bashio::log.blue "Autodetection : INTERFACE_NAME=$INTERFACE_NAME"
+fi
+
 bashio::log.info "Starting..."
-/usr/bin/python3 /opt/arpspoof/arpspoof.py
\ No newline at end of file
+/usr/bin/python3 /opt/arpspoof/arpspoof.py