Thanks for your help. I have tried adding "--data-ciphers-fallback BF-CBC". It worked, both in 386.4 and 386.5 for RT-AX88U. a factory reset may be needed on asus.
As for USG client to ping ASUS LAN, please try to add following to your ASUS openvpn server's "custom configuation"
push "route...
Tks for help. It does not seem to work. I have tried all the combinations but ended in vain. Now revert back to 384.3_2. openvpn 2.5 has changed lots. It seems we can only wait for Unifi to update to openvpn 2.5 as well.
Hi, I have a RT-AX88U. After updating to Merlin 386.4, its openvpn server no longer connects to an Unifi site-to-site openvpn client.
Re-creating the openvpn server on AX88U does not help either.
(Downgrading to the previous 386.3_2 solves the problem, however.)
The error messages is ...