Client is working fine here and the server seems to be working fine. I'm thinking it's something else.
Are you running OVPN Clients at the same time as OVPN Servers ? If
not then ignore the rest of this reply.
I am on 386.7_2 installed on RT-AX86U with hard reset and USB drive reformat without settings restore - during last weekend I could connect remotely to the OVPN Server (LAN only, advertise DNS to Clients > Yes) but
not access the router web GUI each day: I think this is the same problem you describe. My router is set to reboot daily, on Day 3 I could remotely access the router web GUI through OVPN Server - but not on Day 1 nor Day 2. Very puzzling.
I made
some setting changes - these need more testing:
1) for OVPN Clients 1 and 2 I'm using NordVPN which uses UDP port 1194. I was also using the default UDP port 1994 for the OpenVPN server, so changed the
OVPN Server to UDP port 1995 when remote on Day 3 and rebooted the router
. I could text edit the .ovpn file for this change (no new certificate required) and connected remotely no problem.
2) on Day 3 OVPN Server subnet setting was 10.8.0.0 and OVPN Client 1 was using local IP 10.8.0.6 and OVPN Client 2 was using local IP 10.8.3.2 (note: today OVPN Client 1 is using 10.8.3.2 and OVPN Client 2 is using 10.8.0.6, so OVPN Clients subnets change in my setup !!! I'm not sure why. Incidentally I am running VPNMGR to update the NordVPN client settings daily). Some old posts on this forum suggested the subnets should be different for OVPN Clients and OVPN Servers. Perhaps my client and server setup was using same subnet and/or local IP on Day 1 and Day 2 ? I changed the
OVPN Server subnet to 172.16.0.0 in the advanced settings remotely on Day 3 and rebooted the router and connected no problem.
I'll continue to test and fingers crossed this is stable ahead (two week remote trip coming up in early October).