@ocvaa So I bought ER605, configured OpenVPN Server to which I can connect from different internet location, however, I have no internet passing through ER605 to VPN Server. Any idea what might be...

@ocvaa Thank you so much, this answer my question: "All the outside (WAN/Internet) in/out connections on ER605 go via 1 physical WAN port connected to ISP (otherwise you use another custom setup"

@ocvaa thank you for sharing the link. However, it still doesn't answer my concerns with physical connection to ER605 :/

@Virgo ISP modem has 4 LAN ports, but what I'm unsure, whether I can connect ISP modem from one of its LAN ports via ethernet cable to WAN port of ER605 and whether ER605 can receive internet...

Can ER605 VPN router be connected to a fiberoptics ISP modem (Sagemcom Fast5670) with one ethernet cable to create a VPN Server in location A, to which I could connect from overseas location B? Or...