OpenVPN Server with DD-WRT as client

[whowe82]

Thank you for taking the time to ready this.  I used the step by step guide for setting up an OpenVPN server on OPNSense and it works really well for Windows clients and MAC clients. 

We're trying to connect a DD-WRT client to it and on the DD-WRT side we keep getting:
20200802 07:47:16 N TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
20200802 07:47:16 N TLS Error: TLS handshake failed

On the server side:

2020-08-02T09:00:13   openvpn[64927]: TLS Error: incoming packet authentication failed from [AF_INET]x.x.x.x:39031
2020-08-02T09:00:13   openvpn[64927]: Authenticate/Decrypt packet error: packet HMAC authentication failed

Any help/thoughts are greatly appreciated.