Asus RT-AC86U OpenVPN TLS handshake issue after VPN disconnection

[BangoO]

Hello,

My OpenVPN connection with VPNac works well for a few days until somehow it stops working and I can't reconnect anymore until I reboot the router:

ovpn-client1[30027]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
ovpn-client1[30027]: TCP/UDP: Preserving recently used remote address: [AF_INET]XXX.XXX.XXX.XXX:50000
ovpn-client1[30027]: TCP/UDP: Preserving recently used remote address: [AF_INET]XXX.XXX.XXX.XXX:50000
ovpn-client1[30027]: Socket Buffers: R=[278528->278528] S=[278528->278528]
ovpn-client1[30027]: UDP link local: (not bound)
ovpn-client1[30027]: UDP link remote: [AF_INET]XXX.XXX.XXX.XXX:50000
ovpn-client1[30027]: TLS: Initial packet from [AF_INET]XXX.XXX.XXX.XXX:50000, sid=XXXXXXXX XXXXXXX
ovpn-client1[30027]: VERIFY OK: depth=1, C=RO, ST=BUC, O=VPN.AC, OU=VPN.AC CA, CN=VPN.AC, emailAddress=info@vpn.ac
ovpn-client1[30027]: VERIFY KU OK
ovpn-client1[30027]: Validating certificate extended key usage
ovpn-client1[30027]: ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
ovpn-client1[30027]: VERIFY EKU OK
ovpn-client1[30027]: VERIFY OK: depth=0, CN=ch1-4096
ovpn-client1[30027]: TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
ovpn-client1[30027]: TLS Error: TLS handshake failed

Is this a known issue ?

I'm using firmware 384.3_beta3

Thank you !
BangoO

 

[BangoO]

I did not reboot the router this time and after 2h of automatically retrying the connection worked:

ovpn-client1[7141]: VERIFY OK: depth=0, CN=ch1-4096
ovpn-client1[7141]: Control Channel: TLSv1.2, cipher TLSv1/SSLv3 ECDHE-RSA-AES256-GCM-SHA384, 4096 bit RSA
ovpn-client1[7141]: [ch1-4096] Peer Connection Initiated with [AF_INET]XXX.XXX.XXX.XXX:50000

 

[BangoO]

Any idea of what could be wrong ?