I have a ISY994 firmware 5.3.4 that works with UD Mobile in the house on wifi, but will not work outside on external network.

I have setup the remote URL, port, username and password on the app. I have also setup port forwarding in my router. when I hit Test Remote Connection with wifi off i keep getting this message "Error (IOException) javax.net.ssl.SSLHandshakeException:connection closed"

Can some one please help me out with this

Thank you 

@RCJ welcome to the forums. I’m not sure if UD Mobile can access remotely as you describe. Based on the wiki other methods are supported.

https://wiki.universal-devices.com/UD_Mobile#Remote_Connections

Did you have the ISY994 connected to the UD Portal before they stopped selling the add-on in 2023? If you have an active portal subscription you can use the portal connection. It’s safer than opening ports on a home router (as long as your password is secure).