Naturally, free services are very popular products because everyone likes to save their monetary system. And, they can be handy bits of software if you're not individual that's in all probability to... ...to occur within 60 seconds (check your network connectivity) TLS Error: TLS handshake failed SIGUSR1[soft,tls-error] received, process restarting. it seems that your problem could be the keys and not the firewall, some of the commons issues when connecting a Raspberry Pi and a VPN server...Jun 22, 2019 · Re: openVPN - TLS key negotiation failed to occur within 60 seconds « Reply #4 on: July 07, 2019, 09:25:30 am » Guten Morgen, ich habe dies bisher nicht von dem WAN Anschluss her testen können, da ich für einen "Test" den Firmenanschluss nicht lahm legen kann.