Well, setting up for scratch is a real pain for me... For now I'll monitor it to see if is a real problem or only an occasional glitch
I manually forced this error to occur and this is what I got in my AX88U log. By the way: can you also force it to happen? I do this by downloading huge test files and wait for a few minutes and it will surely disconnect.
Dec 08 19:52:40 RT-AX88U WAN(0)_Connection WAN(0) link down.
Dec 08 19:53:02 RT-AX88U hostapd eth6: STA 40:9f:38:31:68:d2 WPA: group key handshake completed (RSN)
Dec 08 19:53:02 RT-AX88U hostapd eth6: STA 54:55:d5:8e:79:3d WPA: group key handshake completed (RSN)
Dec 08 19:53:22 RT-AX88U rc_service wanduck 1032:notify_rc restart_wan_if 0
Dec 08 19:53:22 RT-AX88U custom_script Running /jffs/scripts/service-event (args: restart wan_if)
Dec 08 19:53:22 RT-AX88U ovpn-server1 event_wait : Interrupted system call (code=4)
Dec 08 19:53:22 RT-AX88U ovpn-server1 Closing TUN/TAP interface
Dec 08 19:53:22 RT-AX88U ovpn-server1 /usr/sbin/ip addr del dev tun21 10.8.0.1/24
Dec 08 19:53:22 RT-AX88U lldpd removal request for address of 10.8.0.1%25, but no knowledge of it
Dec 08 19:53:22 RT-AX88U ovpn-server1 ovpn-down 1 server tun21 1500 1621 10.8.0.1 255.255.255.0 init
Dec 08 19:53:22 RT-AX88U ovpn-server1 PLUGIN_CLOSE: /usr/lib/openvpn-plugin-auth-pam.so
Dec 08 19:53:22 RT-AX88U ovpn-server1 PLUGIN AUTH-PAM: Error signaling background process to exit: Connection refused (errno=111)
Dec 08 19:53:22 RT-AX88U ovpn-server1 SIGTERM[hard,] received, process exiting
Dec 08 19:53:22 RT-AX88U ovpn-server2 event_wait : Interrupted system call (code=4)
Dec 08 19:53:22 RT-AX88U ovpn-server2 Closing TUN/TAP interface
Dec 08 19:53:22 RT-AX88U ovpn-server2 /usr/sbin/ip addr del dev tun22 10.16.0.1/24
Dec 08 19:53:22 RT-AX88U lldpd removal request for address of 10.16.0.1%26, but no knowledge of it
Dec 08 19:53:22 RT-AX88U ovpn-server2 ovpn-down 2 server tun22 1500 1621 10.16.0.1 255.255.255.0 init
Dec 08 19:53:22 RT-AX88U ovpn-server2 PLUGIN_CLOSE: /usr/lib/openvpn-plugin-auth-pam.so
Dec 08 19:53:22 RT-AX88U ovpn-server2 PLUGIN AUTH-PAM: Error signaling background process to exit: Connection refused (errno=111)
Dec 08 19:53:22 RT-AX88U ovpn-server2 SIGTERM[hard,] received, process exiting
Dec 08 19:53:22 RT-AX88U lldpd removal request for address of 84.xxx.xxx.177%12, but no knowledge of it
Dec 08 19:53:25 RT-AX88U wan finish adding multi routes
Dec 08 19:53:25 RT-AX88U Skynet
Startup Initiated... ( skynetloc=/tmp/mnt/ext4/skynet )
Dec 08 19:53:25 RT-AX88U rc_service udhcpc_wan 13263:notify_rc start_vpnserver1
Dec 08 19:53:25 RT-AX88U rc_service udhcpc_wan 13263:notify_rc start_vpnserver2
Dec 08 19:53:25 RT-AX88U rc_service waitting "start_vpnserver1" via udhcpc_wan ...
Dec 08 19:53:25 RT-AX88U custom_script Running /jffs/scripts/service-event (args: start vpnserver1)
Dec 08 19:53:25 RT-AX88U ovpn-server1 OpenVPN 2.5.7 arm-buildroot-linux-gnueabi [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Dec 3 2022
Dec 08 19:53:25 RT-AX88U ovpn-server1 library versions: OpenSSL 1.1.1s 1 Nov 2022, LZO 2.08
Dec 08 19:53:25 RT-AX88U ovpn-server1 NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Dec 08 19:53:25 RT-AX88U ovpn-server1 PLUGIN AUTH-PAM: initialization succeeded (fg)
Dec 08 19:53:25 RT-AX88U ovpn-server1 PLUGIN_INIT: POST /usr/lib/openvpn-plugin-auth-pam.so '[/usr/lib/openvpn-plugin-auth-pam.so] [openvpn]' intercepted=PLUGIN_AUTH_USER_PASS_VERIFY
Dec 08 19:53:25 RT-AX88U ovpn-server1 Diffie-Hellman initialized with 2048 bit key
Dec 08 19:53:25 RT-AX88U ovpn-server1 Outgoing Control Channel Authentication: Using 512 bit message hash 'SHA512' for HMAC authentication
Dec 08 19:53:25 RT-AX88U ovpn-server1 Incoming Control Channel Authentication: Using 512 bit message hash 'SHA512' for HMAC authentication
Dec 08 19:53:25 RT-AX88U ovpn-server1 TUN/TAP device tun21 opened
Dec 08 19:53:25 RT-AX88U ovpn-server1 TUN/TAP TX queue length set to 1000
Dec 08 19:53:25 RT-AX88U ovpn-server1 /usr/sbin/ip link set dev tun21 up mtu 1500
Dec 08 19:53:25 RT-AX88U vpnserver1 PLUGIN AUTH-PAM: BACKGROUND: initialization succeeded
Dec 08 19:53:25 RT-AX88U ovpn-server1 /usr/sbin/ip link set dev tun21 up
Dec 08 19:53:25 RT-AX88U ovpn-server1 /usr/sbin/ip addr add dev tun21 10.8.0.1/24
Dec 08 19:53:25 RT-AX88U ovpn-server1 ovpn-up 1 server tun21 1500 1621 10.8.0.1 255.255.255.0 init
Dec 08 19:53:25 RT-AX88U ovpn-server1 Socket Buffers: R=[524288->524288] S=[524288->524288]
Dec 08 19:53:25 RT-AX88U ovpn-server1 UDPv4 link local (bound): [AF_INET][undef]:xxxxxxxxx
Dec 08 19:53:25 RT-AX88U ovpn-server1 UDPv4 link remote: [AF_UNSPEC]
Dec 08 19:53:25 RT-AX88U ovpn-server1 MULTI: multi_init called, r=256 v=256
Dec 08 19:53:25 RT-AX88U ovpn-server1 IFCONFIG POOL IPv4: base=10.8.0.2 size=253
Dec 08 19:53:25 RT-AX88U ovpn-server1 Initialization Sequence Completed
Dec 08 19:53:26 RT-AX88U rc_service wanduck 1032:notify_rc restart_wan_line 1
Dec 08 19:53:26 RT-AX88U custom_script Running /jffs/scripts/service-event (args: restart wan_line)
Dec 08 19:53:26 RT-AX88U custom_script Running /jffs/scripts/firewall-start (args: eth4)
Dec 08 19:53:26 RT-AX88U wan finish adding multi routes
Dec 08 19:53:26 RT-AX88U Skynet [*] Lock File Detected (start skynetloc=/tmp/mnt/ext4/skynet) (pid=13270) - Exiting (cpid=13646)
Dec 08 19:53:26 RT-AX88U Diversion added type 65 blocking rules in iptables and ip6tables
Dec 08 19:53:26 RT-AX88U ovpn-server1 event_wait : Interrupted system call (code=4)
Dec 08 19:53:26 RT-AX88U ovpn-server1 Closing TUN/TAP interface
Dec 08 19:53:26 RT-AX88U ovpn-server1 /usr/sbin/ip addr del dev tun21 10.8.0.1/24
Dec 08 19:53:26 RT-AX88U lldpd removal request for address of 10.8.0.1%29, but no knowledge of it
Dec 08 19:53:26 RT-AX88U ovpn-server1 ovpn-down 1 server tun21 1500 1621 10.8.0.1 255.255.255.0 init
Dec 08 19:53:26 RT-AX88U ovpn-server1 PLUGIN_CLOSE: /usr/lib/openvpn-plugin-auth-pam.so
Dec 08 19:53:26 RT-AX88U ovpn-server1 PLUGIN AUTH-PAM: Error signaling background process to exit: Connection refused (errno=111)
Dec 08 19:53:26 RT-AX88U ovpn-server1 SIGTERM[hard,] received, process exiting