Inactivity timeout (--ping-restart) & TAP-Windows Adapter V9 problem

completeForm

Hello,

I have a pfsense router on which I have set up an OpenVPN server @ UDP:1194 standard port. Server config is here:

dev ovpns1
verb 1
dev-type tun
dev-node /dev/tun1
writepid /var/run/openvpn_server1.pid
#user nobody
#group nobody
script-security 3
daemon
keepalive 10 60
ping-timer-rem
persist-tun
persist-key
proto udp4
cipher AES-256-OFB
auth SHA512
up /usr/local/sbin/ovpn-linkup
down /usr/local/sbin/ovpn-linkdown
client-connect /usr/local/sbin/openvpn.attributes.sh
client-disconnect /usr/local/sbin/openvpn.attributes.sh
local X.X.X.X (my WAN external IP)
engine rdrand
tls-server
server 10.0.8.0 255.255.255.0
client-config-dir /var/etc/openvpn-csc/server1
username-as-common-name
plugin /usr/local/lib/openvpn/plugins/openvpn-plugin-auth-script.so /usr/local/sbin/ovpn_auth_verify_async user TG9jYWwgRGF0YWJhc2U= false server1 1194
tls-verify "/usr/local/sbin/ovpn_auth_verify tls 'OpenVPN+Server' 1"
lport 1194
management /var/etc/openvpn/server1.sock unix
max-clients 1
push "route 192.168.1.0 255.255.255.0"
client-to-client
ca /var/etc/openvpn/server1.ca 
cert /var/etc/openvpn/server1.cert 
key /var/etc/openvpn/server1.key 
dh /etc/dh-parameters.4096
tls-auth /var/etc/openvpn/server1.tls-auth 0
ncp-ciphers AES-128-GCM
compress lz4-v2
persist-remote-ip
float
topology subnet

I have a Windows 7 client whose config is here:

dev tun
persist-tun
persist-key
cipher none
auth none
tls-client
client
resolv-retry infinite
remote 193.77.28.122 1194 udp
verify-x509-name "OpenVPN Server" name
auth-user-pass
pkcs12 pfSense-UDP4-1194-vpnuser.p12
tls-auth pfSense-UDP4-1194-vpnuser-tls.key 1
remote-cert-tls server
compress lz4-v2

I have two problems:

1. The connection regularly breaks down, especially if the bandwidth over tunnel increases. The message is

<timestamp> [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
<timestamp> SIGUSR1[soft,ping-restart] received, process restarting

2. Sometimes the connection is not able to recover. In this case I have to connect to the client with TeamViewer and must disable and re-enable TAP-Windows Adapter V9 in order for pings between tunnel network and LAN to start functioning again.

Does anyone have an idea how could I correct this problem?

3. Why does my OpenVPN connection create and use TAP adapter on Winodws if the connection is "dev tun" and not "dev tap"?

Here is the client's log file:

Sun Mar 31 10:17:55 2019 SIGTERM[hard,] received, process exiting
Sun Mar 31 10:20:29 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Sun Mar 31 10:20:29 2019 Windows version 6.1 (Windows 7) 64bit
Sun Mar 31 10:20:29 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Enter Management Password:
Sun Mar 31 10:24:47 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Sun Mar 31 10:24:47 2019 Windows version 6.1 (Windows 7) 64bit
Sun Mar 31 10:24:47 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Enter Management Password:
Sun Mar 31 10:24:48 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:24:55 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:24:55 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:24:55 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Sun Mar 31 10:24:55 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:24:56 2019 open_tun
Sun Mar 31 10:24:56 2019 TAP-WIN32 device [Local Area Connection 2] opened: \\.\Global\{E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}.tap
Sun Mar 31 10:24:56 2019 Set TAP-Windows TUN subnet mode network/local/netmask = 10.0.8.0/10.0.8.2/255.255.255.0 [SUCCEEDED]
Sun Mar 31 10:24:56 2019 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.0.8.2/255.255.255.0 on interface {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980} [DHCP-serv: 10.0.8.254, lease-time: 31536000]
Sun Mar 31 10:24:56 2019 Successful ARP Flush on interface [16] {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}
Sun Mar 31 10:25:01 2019 Initialization Sequence Completed
Sun Mar 31 10:46:20 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 10:46:20 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 10:46:25 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:46:25 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:46:25 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:46:26 2019 TLS Error: local/remote TLS keys are out of sync: [AF_INET]X.X.X.X:1194 [0]
Sun Mar 31 10:46:27 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:46:28 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 10:46:28 2019 Initialization Sequence Completed
Sun Mar 31 10:47:29 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 10:47:29 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 10:47:34 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:47:34 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:47:34 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:47:34 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:47:35 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 10:47:35 2019 Initialization Sequence Completed
Sun Mar 31 10:47:48 2019 NOTE: Release of DHCP-assigned IP address lease on TAP-Windows adapter failed: Access is denied.   (code=5)
Sun Mar 31 10:48:34 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Sun Mar 31 10:48:34 2019 Windows version 6.1 (Windows 7) 64bit
Sun Mar 31 10:48:34 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Enter Management Password:
Sun Mar 31 10:48:36 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:48:36 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:48:36 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:48:36 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Sun Mar 31 10:48:36 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:48:37 2019 open_tun
Sun Mar 31 10:48:37 2019 TAP-WIN32 device [Local Area Connection 2] opened: \\.\Global\{E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}.tap
Sun Mar 31 10:48:37 2019 Set TAP-Windows TUN subnet mode network/local/netmask = 10.0.8.0/10.0.8.2/255.255.255.0 [SUCCEEDED]
Sun Mar 31 10:48:37 2019 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.0.8.2/255.255.255.0 on interface {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980} [DHCP-serv: 10.0.8.254, lease-time: 31536000]
Sun Mar 31 10:48:37 2019 Successful ARP Flush on interface [16] {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}
Sun Mar 31 10:48:42 2019 Initialization Sequence Completed
Sun Mar 31 10:52:49 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 10:52:49 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 10:52:54 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:52:54 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:52:54 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:52:54 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:52:55 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 10:52:55 2019 Initialization Sequence Completed
Sun Mar 31 10:53:55 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 10:53:55 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 10:54:00 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:54:00 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:54:00 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:54:00 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:54:01 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 10:54:01 2019 Initialization Sequence Completed
Sun Mar 31 10:54:35 2019 NOTE: Release of DHCP-assigned IP address lease on TAP-Windows adapter failed: Access is denied.   (code=5)
Sun Mar 31 10:54:48 2019 SIGTERM[hard,] received, process exiting
Sun Mar 31 10:54:58 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Sun Mar 31 10:54:58 2019 Windows version 6.1 (Windows 7) 64bit
Sun Mar 31 10:54:58 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Enter Management Password:
Sun Mar 31 10:55:00 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:55:00 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:55:00 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:55:00 2019 TLS Error: local/remote TLS keys are out of sync: [AF_INET]X.X.X.X:1194 [0]
Sun Mar 31 10:55:00 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Sun Mar 31 10:55:00 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:55:01 2019 open_tun
Sun Mar 31 10:55:01 2019 TAP-WIN32 device [Local Area Connection 2] opened: \\.\Global\{E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}.tap
Sun Mar 31 10:55:01 2019 Set TAP-Windows TUN subnet mode network/local/netmask = 10.0.8.0/10.0.8.2/255.255.255.0 [SUCCEEDED]
Sun Mar 31 10:55:01 2019 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.0.8.2/255.255.255.0 on interface {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980} [DHCP-serv: 10.0.8.254, lease-time: 31536000]
Sun Mar 31 10:55:01 2019 Successful ARP Flush on interface [16] {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}
Sun Mar 31 10:55:06 2019 Initialization Sequence Completed
Sun Mar 31 10:58:26 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 10:58:26 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 10:58:31 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:58:31 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:58:31 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:58:31 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:58:32 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 10:58:32 2019 Initialization Sequence Completed
Sun Mar 31 10:59:26 2019 TUN/TAP I/O operation aborted, restarting
Sun Mar 31 10:59:26 2019 Warning: route gateway is not reachable on any active network adapters: 10.0.8.1
Sun Mar 31 10:59:26 2019 SIGHUP[soft,tun-abort] received, process restarting
Sun Mar 31 10:59:26 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Sun Mar 31 10:59:26 2019 Windows version 6.1 (Windows 7) 64bit
Sun Mar 31 10:59:26 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Sun Mar 31 10:59:36 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:59:36 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 10:59:36 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 10:59:36 2019 TLS Error: local/remote TLS keys are out of sync: [AF_INET]X.X.X.X:1194 [0]
Sun Mar 31 10:59:36 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 10:59:37 2019 open_tun
Sun Mar 31 10:59:37 2019 All TAP-Windows adapters on this system are currently in use.
Sun Mar 31 10:59:37 2019 Exiting due to fatal error
Sun Mar 31 10:59:59 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Sun Mar 31 10:59:59 2019 Windows version 6.1 (Windows 7) 64bit
Sun Mar 31 10:59:59 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Enter Management Password:
Sun Mar 31 11:00:00 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:00:00 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:00:00 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:00:00 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Sun Mar 31 11:00:00 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:00:12 2019 open_tun
Sun Mar 31 11:00:12 2019 TAP-WIN32 device [Local Area Connection 2] opened: \\.\Global\{E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}.tap
Sun Mar 31 11:00:12 2019 Set TAP-Windows TUN subnet mode network/local/netmask = 10.0.8.0/10.0.8.2/255.255.255.0 [SUCCEEDED]
Sun Mar 31 11:00:12 2019 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.0.8.2/255.255.255.0 on interface {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980} [DHCP-serv: 10.0.8.254, lease-time: 31536000]
Sun Mar 31 11:00:12 2019 Successful ARP Flush on interface [16] {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}
Sun Mar 31 11:00:17 2019 Initialization Sequence Completed
Sun Mar 31 11:13:38 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:13:38 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:13:43 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:13:43 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:13:43 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:13:43 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:13:44 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:13:44 2019 Initialization Sequence Completed
Sun Mar 31 11:14:44 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:14:44 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:14:49 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:14:49 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:14:49 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:14:49 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:14:50 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:14:50 2019 Initialization Sequence Completed
Sun Mar 31 11:15:52 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:15:52 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:15:57 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:15:57 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:15:57 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:15:57 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:15:58 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:15:58 2019 Initialization Sequence Completed
Sun Mar 31 11:17:07 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:17:07 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:17:12 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:17:12 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:17:12 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:17:13 2019 TLS Error: local/remote TLS keys are out of sync: [AF_INET]X.X.X.X:1194 [0]
Sun Mar 31 11:17:15 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:17:16 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:17:16 2019 Initialization Sequence Completed
Sun Mar 31 11:18:24 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:18:24 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:18:29 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:18:29 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:18:29 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:18:29 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:18:30 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:18:30 2019 Initialization Sequence Completed
Sun Mar 31 11:19:39 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:19:39 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:19:44 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:19:44 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:19:44 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:19:44 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:19:46 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:19:46 2019 Initialization Sequence Completed
Sun Mar 31 11:21:19 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:21:19 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:21:24 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:21:24 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:21:24 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:21:24 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:21:26 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:21:26 2019 Initialization Sequence Completed
Sun Mar 31 11:22:59 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:22:59 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:23:04 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:23:04 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:23:04 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:23:04 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:23:05 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:23:05 2019 Initialization Sequence Completed
Sun Mar 31 11:24:40 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:24:40 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:24:45 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:24:45 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:24:45 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:24:45 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:24:46 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:24:46 2019 Initialization Sequence Completed
Sun Mar 31 11:26:19 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:26:19 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:26:24 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:26:24 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:26:24 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:26:24 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:26:25 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:26:25 2019 Initialization Sequence Completed
Sun Mar 31 11:27:59 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:27:59 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:28:04 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:28:04 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:28:04 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:28:07 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:28:08 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:28:08 2019 Initialization Sequence Completed
Sun Mar 31 11:29:39 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:29:39 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:29:44 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:29:44 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:29:44 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:29:44 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:29:45 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:29:45 2019 Initialization Sequence Completed
Sun Mar 31 11:32:09 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:32:09 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:32:14 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:32:14 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:32:14 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:32:15 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:32:16 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:32:16 2019 Initialization Sequence Completed
Sun Mar 31 11:33:49 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:33:49 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:33:54 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:33:54 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:33:54 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:33:54 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:33:57 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:33:57 2019 Initialization Sequence Completed
Sun Mar 31 11:35:29 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:35:29 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:35:34 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:35:34 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:35:34 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:35:40 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:35:41 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:35:41 2019 Initialization Sequence Completed
Sun Mar 31 11:37:09 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:37:09 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:37:14 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:37:14 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:37:14 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:37:15 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:37:16 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:37:16 2019 Initialization Sequence Completed
Sun Mar 31 11:38:49 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:38:49 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:38:54 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:38:54 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:38:54 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:38:54 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:38:56 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:38:56 2019 Initialization Sequence Completed
Sun Mar 31 11:40:29 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:40:29 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:40:34 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:40:34 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:40:34 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:40:34 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Sun Mar 31 11:40:36 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Sun Mar 31 11:40:36 2019 Initialization Sequence Completed
Sun Mar 31 11:43:38 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:43:38 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:43:43 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:43:43 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:43:43 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:44:44 2019 [UNDEF] Inactivity timeout (--ping-restart), restarting
Sun Mar 31 11:44:44 2019 SIGUSR1[soft,ping-restart] received, process restarting
Sun Mar 31 11:44:49 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:44:49 2019 UDP link local (bound): [AF_INET][undef]:1194
Sun Mar 31 11:44:49 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Sun Mar 31 11:44:56 2019 TLS Error: cannot locate HMAC in incoming packet from [AF_INET]X.X.X.X:1194
Sun Mar 31 11:44:58 2019 TLS Error: cannot locate HMAC in incoming packet from [AF_INET]X.X.X.X:1194
Sun Mar 31 11:45:02 2019 TLS Error: cannot locate HMAC in incoming packet from [AF_INET]X.X.X.X:1194
Sun Mar 31 11:45:10 2019 TLS Error: cannot locate HMAC in incoming packet from [AF_INET]X.X.X.X:1194
Sun Mar 31 11:45:26 2019 TLS Error: cannot locate HMAC in incoming packet from [AF_INET]X.X.X.X:1194
Sun Mar 31 11:45:33 2019 NOTE: Release of DHCP-assigned IP address lease on TAP-Windows adapter failed: Access is denied.   (code=5)
Sun Mar 31 11:45:33 2019 SIGTERM[hard,] received, process exiting

TinCanTech

Have you actually checked your settings in your config files ? ... like cipher for instance ..

And why would you want to have your client IP persist when in fact they could change at any time ..

completeForm

TinCanTech wrote Have you actually checked your settings in your config files ? ... like cipher for instance ..

Yes. I do not get any TLS errors anymore.

TinCanTech wrote And why would you want to have your client IP persist when in fact they could change at any time ..

I have fixed IP.

The connectivity problem remains. As I connect with MS RDP from my LAN to Windows 7 OpenVPN client machine, the connection usually stops working. See the log below from today. At around 09:38:15 I started RDP session and the connection was lost. Then client tried to reconnect a few times with apparent success, but I could not ping or reach anything on my client machine. Then I connected with TeamViewer (timestamp around 09:40:43 and later) and the connection started working again by iself, I did not do anything on client, just connected to it with TeamViewer and since that point there were no more restarts in the OpenVPN client log.

Mon Apr 01 08:50:08 2019 OpenVPN 2.4.7 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Feb 21 2019
Mon Apr 01 08:50:08 2019 Windows version 6.1 (Windows 7) 64bit
Mon Apr 01 08:50:08 2019 library versions: OpenSSL 1.1.0j  20 Nov 2018, LZO 2.10
Mon Apr 01 08:50:10 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Mon Apr 01 08:50:10 2019 UDP link local (bound): [AF_INET][undef]:1194
Mon Apr 01 08:50:10 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Mon Apr 01 08:50:10 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Mon Apr 01 08:50:10 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Mon Apr 01 08:50:11 2019 open_tun
Mon Apr 01 08:50:11 2019 TAP-WIN32 device [Local Area Connection 2] opened: \\.\Global\{E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}.tap
Mon Apr 01 08:50:11 2019 Set TAP-Windows TUN subnet mode network/local/netmask = 10.0.8.0/10.0.8.2/255.255.255.0 [SUCCEEDED]
Mon Apr 01 08:50:11 2019 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.0.8.2/255.255.255.0 on interface {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980} [DHCP-serv: 10.0.8.254, lease-time: 31536000]
Mon Apr 01 08:50:11 2019 Successful ARP Flush on interface [16] {E8F6477A-5F72-41B4-BEE1-9B7FFF8FD980}
Mon Apr 01 08:50:17 2019 Initialization Sequence Completed
Mon Apr 01 09:38:15 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Mon Apr 01 09:38:15 2019 SIGUSR1[soft,ping-restart] received, process restarting
Mon Apr 01 09:38:20 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Mon Apr 01 09:38:20 2019 UDP link local (bound): [AF_INET][undef]:1194
Mon Apr 01 09:38:20 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Mon Apr 01 09:38:20 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Mon Apr 01 09:38:22 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Mon Apr 01 09:38:22 2019 Initialization Sequence Completed
Mon Apr 01 09:39:25 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Mon Apr 01 09:39:25 2019 SIGUSR1[soft,ping-restart] received, process restarting
Mon Apr 01 09:39:30 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Mon Apr 01 09:39:30 2019 UDP link local (bound): [AF_INET][undef]:1194
Mon Apr 01 09:39:30 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Mon Apr 01 09:39:30 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Mon Apr 01 09:39:31 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Mon Apr 01 09:39:31 2019 Initialization Sequence Completed
Mon Apr 01 09:40:37 2019 [OpenVPN Server] Inactivity timeout (--ping-restart), restarting
Mon Apr 01 09:40:37 2019 SIGUSR1[soft,ping-restart] received, process restarting
Mon Apr 01 09:40:42 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]X.X.X.X:1194
Mon Apr 01 09:40:42 2019 UDP link local (bound): [AF_INET][undef]:1194
Mon Apr 01 09:40:42 2019 UDP link remote: [AF_INET]X.X.X.X:1194
Mon Apr 01 09:40:42 2019 [OpenVPN Server] Peer Connection Initiated with [AF_INET]X.X.X.X:1194
Mon Apr 01 09:40:43 2019 Preserving previous TUN/TAP instance: Local Area Connection 2
Mon Apr 01 09:40:43 2019 Initialization Sequence Completed

completeForm

I have found the culprit. It was the third-party firewall software firewall on Windows client. I had to uninstall it, disabling it was not enough.