@Argh2004 Hi, you can disable dhcp server on the ER605 if you don't need it, and now you have double dhcp servers in your network. And a static route need to be set on the ER605, I think, you should...

@user245 Hi, Dude, take a look: No internet access when connected to OpenVPN

@Marco2023 Hi, check this: Are Full Chain SSL Certificates supported?

@Marco2023 I thought you should use it under the controller mode and you can go to System settings to import it:

@RecordWorkz Suggest you upgrade the firmware to the latest, I remember they fix a BUG related the port forwarding. ER605(UN)_V2_2.1.2 Build 20230210

@Andy_Liang Hi, I wonder if you download the firmware back to 2.0.1? Did you still have the same issue? Here is an article that shows you how to upgrade/downgrade the firmware. VIGI C540 VIGI C340-W...