@DudeBro Hi, did you use ER8411 as the OpenVPN server? What is the VPN client? Did you use the certificate + account for VPN authentication?

@Nert Nope, the ER605 is a NAT device and you can not disable the NAT on it. Or you can try to create a site-site IPsec VPN between the ASUS router and blue ER605, and keep green ER605 connected to...

@DREEMus Uhmm.......then contacting to support team for a replacement is a good choice, the switch may have been broken.

@IMV8N Hello, your VLAN settings seem like no problem, but it still needs to set PVID on the switch, did you set that? Check this.

@Andy_Silvestre Hello, I remember TL-R480T+ is a very old product, maybe using an ER7206 to replace it is a good choice. Have you tested the front modem, is the link stable? If you have used it for a...

@ITfolks Hello, it is an old question, you will see several same questions if you search on the community, And it is normal if it doesn't affect the usage of your router I thought.