@GRL @Franklin7777 I did a test with my ER707-M2, it works with L2TP, firmware version on the router is 1.3.1 Build 20251009 Rel.67687

@Franklin7777 Port forward? You shouldn't use it, delete all port forwarders and try again.

@NeoCZ No, you cannot use USB for SD-WAN

@Bug_do_Ti try another vpn client, I use wireguard client from wireguard. never problems.

@Fabiuzz I set ip like this on switches

@Fabiuzz no, I have used fqdn since the start of omada sdn, I have dynamic ip so that's why I have to use fqdn, no problem. The problem could be the dns server that the devices use, it could be ports...