OpenVPN cloud connection issues

[deanfourie]

Hi, I need help trying to connect a Teltonika RTU2400 to OpenVPN cloud, however when attempting to connect I receive the following error.

Sat Dec 28 23:15:47 2024 daemon.notice openvpn(ovpntest)[7225]: net_addr_v4_add: 172.16.100.22/28 dev tun_c_ovpntest
Sat Dec 28 23:15:47 2024 daemon.notice openvpn(ovpntest)[7225]: net_iface_mtu_set: mtu 1500 for tun_c_ovpntest
Sat Dec 28 23:15:47 2024 daemon.notice openvpn(ovpntest)[7225]: net_iface_up: set tun_c_ovpntest up
Sat Dec 28 23:15:47 2024 daemon.notice openvpn(ovpntest)[7225]: net_addr_v6_add: fd:0:0:4001::6/64 dev tun_c_ovpntest
Sat Dec 28 23:15:47 2024 daemon.warn openvpn(ovpntest)[7225]: sitnl_send: rtnl: generic error (-13): Permission denied
Sat Dec 28 23:15:47 2024 daemon.err openvpn(ovpntest)[7225]: Linux can't add IPv6 to interface tun_c_ovpntest
Sat Dec 28 23:15:47 2024 daemon.notice openvpn(ovpntest)[7225]: Exiting due to fatal error

Any idea how I can resolve this?

Thanks

[Martynas]

Hello,

Based on the logs you provided, it seems that OpenVPN is unable to assign an IPv6 address to your tunnel interface due to a permission denial.

If IPv6 is not required for your connection, you could try disabling it in your OpenVPN configuration file by adding the following lines to your .ovpn configuration file:

pull-filter ignore "ifconfig-ipv6"
route-ipv6 0.0.0.0

After making these changes, try reconnecting and check if the issue is resolved.

Best regards,