@Carlootje I try enable USB on a site, but there is no option to use this as wan in any vpn configuguration,, so it look like that usb is primary for failover to give internet when main line is down....

@Carlootje Carlootje wrote @MR.S dear sir, when I connect also my laptop on the LAN I can make the same L2TP connection without a problem. So then the proble, I think isn't at the provider is it?...

@Carlootje You are problably behind a cgnat. very common on 4g. you have to speak with your 4g provider and ask for apn with public ip

@Aviv_Malka you will se it in client list.

@Aviv_Malka it's been a while since I used the oc200, but if I remember correctly it doesn't show in the device list.

@Cotchet is the WiFi on VLAN 1 or is it on a different VLAN? in that case check whether all VLANs are enabled on the SFP interface