Cannot set up OpenVPN Road Warrior

[af-admin]

Hello everyone,

I am following this guide: https://docs.opnsense.org/manual/how-tos/sslvpn_client.html
However, I have tried several modifications of the suggested setup, none of which have worked so far:
- different cipher suites
- with and without OTP
- user auth, certificates and both

For each of the scenarios I tried out, I received timeout errors from my client. Here is the configuration:

Corporate WAN # OPNSense router (X) # ISP Gateway (Y) <=> Personal gateway (A) # Client (B)
X as per tutorial with the modifications from above, OPNSense version 20.1 . It uses a static IP e.f.g.h.
Y has additional port forwarding rules of the form abcd -> 1194 (X) with IP i.j.k.l.

A uses default settings, static IP m.n.o.p.
B is running openSUSE + NetworkManager (version 1.10.6) + Openconnect plugin with a dynamic IP address. Tried connecting to port 1194 and abcd with the same negative result.
Have you experienced similar problems and been able to solve them? Do you require additional information?