IPv6: Linux route add command failed: external program exited with error status: 2
There're still errors in the log that adding an ipv6 route is failing:
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,TCP connection established with [AF_INET]5.79.86.180:443
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,TCPv4_CLIENT link local: (not bound)
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,TCPv4_CLIENT link remote: [AF_INET]5.79.86.180:443
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,NOTE: UID/GID downgrade will be delayed because of --client, --pull, or --up-delay
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,TCP connection established with [AF_INET]5.79.86.180:443
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,TCPv4_CLIENT link local: (not bound)
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,TCPv4_CLIENT link remote: [AF_INET]5.79.86.180:443
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,NOTE: UID/GID downgrade will be delayed because of --client, --pull, or --up-delay
2018-02-09T11:43:59+0100 [stdout#info] >LOG:1518173039,I,[tenca.riseup.net] Peer Connection Initiated with [AF_INET]5.79.86.180:443
2018-02-09T11:44:00+0100 [stdout#info] >LOG:1518173040,I,[tenca.riseup.net] Peer Connection Initiated with [AF_INET]5.79.86.180:443
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,W,Note: option tun-ipv6 is ignored because modern operating systems do not need special IPv6 tun handling anymore.
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,W,GDG6: NLSMG_ERROR: error -101
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,TUN/TAP device tun0 opened
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,D,do_ifconfig, tt->did_ifconfig_ipv6_setup=1
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,/sbin/ip link set dev tun0 up mtu 1500
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,/sbin/ip addr add dev tun0 10.41.0.21/21 broadcast 10.41.7.255
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,/sbin/ip -6 addr add 2001:db8:123::1013/64 dev tun0
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,W,ERROR: Linux route add command failed: external program exited with error status: 2
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,add_route_ipv6(2000::/3 -> 2001:db8:123::1 metric -1) dev tun0
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,GID set to nogroup
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,UID set to nobody
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,W,WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
2018-02-09T11:44:01+0100 [stdout#info] >LOG:1518173041,I,Initialization Sequence Completed