@Duncho no idea - might be wotrh to open another support thread for that specific issue. Due to different reasons I use L2TP connections to my ER605 so can't really help here

@3287bluehawk From fiber cable you should have some "Gigabit Ethernet Media Converter". Something like: mc220l or dmc-g01lc Did you tried to swap this to another one ? I have a giga fiber and in past...

Duncho wrote @ocvaa thank you for sharing the link. However, it still doesn't answer my concerns with physical connection to ER605 :/ Im not sure that I do understand the actual question... 1. You...

See this video with pretty detailed ER 605 VPN settings step by step info https://www.youtube.com/watch?v=xeeeC2mAY1I