I faced with same issue after changed router from Zyxel Keenetic Lite to Xiaomi A4 Giga Edition.
My connection use PPPOE on router.
Ubuntu 21.10 and openconnect VPN.
I faced with same issue after changed router from Zyxel Keenetic Lite to Xiaomi A4 Giga Edition.
My connection use PPPOE on router.
Ubuntu 21.10 and openconnect VPN.