How to Use OpenVPN Client with USG FLEX 200H Behind Router NAT?

Zyxel_Cooldia

Question: 

Is it possible to use the OpenVPN client when the USG FLEX 200H is behind a router with NAT (Private IP in WAN)?

Answer: 

Yes, it is possible to use the OpenVPN client with the USG FLEX 200H behind a router with NAT (Private IP in WAN).

Solution: 

To resolve the issue, you need to change the private IP to the public IP in the OpenSSL configuration file. For this, follow these steps:

1. Edit the OpenSSL configuration file.
2. Replace the private IP with the public IP.