Posts by mbedy

  • Command "ip route del default" is not able remove default-route

    Problem is with OpenVPN deamon which tries to modify the routing table when establishing new VPN, see here:

    # /run/openvpn.log

    ...

    Tue Jan 28 15:54:02 2020 /sbin/ip route add 195.20.170.27/32 via 192.168.211.2

    Tue Jan 28 15:54:02 2020 /sbin/ip route del 0.0.0.0/0

    Tue Jan 28 15:54:02 2020 /sbin/ip route add 0.0.0.0/0 via 10.45.0.1

    ip: RTNETLINK answers: File exists

    Tue Jan 28 15:54:02 2020 ERROR: Linux route add command failed: external program exited with error status: 2


    OpenVPN is not able to install a new defailt-route (via VPN tunnel) because the previous one has not been removed from the routeing table. When it tries to install a new default-route, it fails with an error.

  • Command "ip route del default" is not able remove default-route

    Hello,

    i hit and observed this problem when i try to run openvpn client.

    I have observerd an issue when openvpn client (startup-script) try to remove the default-route from a routing table. Later i tried it manually with the following commands, see bellow. The goal was to remove a default-route from the routing table, which did not happen. The IP address of LAN is configured in manual mode as 192.168.211.130/24, gateway 192.168.211.2.

    LibreELEC:/usr/sbin # ip route

    default via 192.168.211.2 dev eth0

    10.45.0.0/24 dev tun0 scope link src 10.45.0.2

    192.168.211.0/24 dev eth0 scope link src 192.168.211.130

    192.168.211.2 dev eth0 scope link

    195.20.170.27 via 192.168.211.2 dev eth0

    >> default-route goes via 192.168.211.2

    >> ATTEMPT #1: here i will try to remove default-route from routing table:

    LibreELEC:/usr/sbin # ip route del default

    LibreELEC:/usr/sbin # ip route

    default via 192.168.211.2 dev eth0

    10.45.0.0/24 dev tun0 scope link src 10.45.0.2

    192.168.211.0/24 dev eth0 scope link src 192.168.211.130

    192.168.211.2 dev eth0 scope link

    195.20.170.27 via 192.168.211.2 dev eth0

    >> default-route has not been removed from the routing table, it is still there !!!

    >> ATTEMPT #2:

    LibreELEC:/usr/sbin # ip route del default via 192.168.211.2 dev eth0

    LibreELEC:/usr/sbin # ip route

    default via 192.168.211.2 dev eth0

    10.45.0.0/24 dev tun0 scope link src 10.45.0.2

    192.168.211.0/24 dev eth0 scope link src 192.168.211.130

    192.168.211.2 dev eth0 scope link

    195.20.170.27 via 192.168.211.2 dev eth0

    >> default-route has not been removed from the routing table, it is still there !!! Why???

    IP commnad is implemented with busybox utility (/usr/bin/busybox ip)

    LibreELEC:~ # busybox

    BusyBox v1.31.0 (2019-11-22 22:56:17 EST) multi-call binary.


    LibreElec Kodi 18.5 Git: 18.5-Leia

    Compiled: 2019-11-23

    Tested images: Virtual image (for Vmware), image for Odroid-C2