- Ubuntu 14.04
OpenVPN 2.3.2
server config file:
topology net30
mode server
tls-server
push "route-gateway 192.168.0.1"
ifconfig 192.168.0.1 192.168.0.2
ifconfig-pool 192.168.0.5 192.168.0.9
port 1196
proto udp
dev tun
keepalive 10 120
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status /var/log/openvpn/devops.log 1
syslog vpn-devops
verb 15
writepid /var/run/openvpn/devops.pid
ca /etc/openvpn/devops/ca.crt
cert /etc/openvpn/devops/server.crt
key /etc/openvpn/devops/server.key
dh /etc/openvpn/dh.pem
ifconfig-pool-persist /var/lib/openvpn/devops.ipp
client-config-dir /etc/openvpn/devops/ccd
crl-verify /etc/openvpn/devops/crl.pem
client-to-client
Problem: whenever restarting the service, I saw this in the log file:
May 17 14:32:08 t-xhyve vpn-devops[21013]: TCP/UDP: Closing socket
May 17 14:32:08 t-xhyve vpn-devops[21013]: Closing TUN/TAP interface
May 17 14:32:08 t-xhyve vpn-devops[21013]: /sbin/ip addr del dev tun1 local 192.168.0.1 peer 192.168.0.2
May 17 14:32:08 t-xhyve vpn-devops[21013]: Linux ip addr del failed: external program exited with error status: 2
So, I would like to use the
https://github.com/OpenVPN/openvpn/blob/master/src/plugins/down-root/README.down-root plugin to call a down script with root privileges.
plugin /usr/lib/openvpn/openvpn-plugin-down-root.so /usr/share/openvpn/down.sh
/usr/share/openvpn/down.sh
#!/bin/sh
/sbin/ip addr del dev $1 local $4 peer $5
then try to restart but I got this:
May 17 14:49:47 t-xhyve vpn-devops[23001]: /sbin/ip addr del dev tun1 local 192.168.0.1 peer 192.168.0.2
May 17 14:49:47 t-xhyve vpn-devops[23228]: PKCS#11: __pkcs11h_forkFixup entry pid=23228, activate_slotevent=1
May 17 14:49:47 t-xhyve vpn-devops[23228]: PKCS#11: __pkcs11h_forkFixup return
May 17 14:49:47 t-xhyve vpn-devops[23001]: Linux ip addr del failed: external program exited with error status: 2
May 17 14:49:47 t-xhyve vpn-devops[23001]: PLUGIN_CALL: PRE type=PLUGIN_DOWN
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[0] = '/usr/lib/openvpn/openvpn-plugin-down-root.so'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[1] = 'tun1'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[2] = '1500'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[3] = '1542'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[4] = '192.168.0.1'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[5] = '192.168.0.2'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ARGV[6] = 'init'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[0] = 'dev=tun1'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[1] = 'link_mtu=1542'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[2] = 'tun_mtu=1500'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[3] = 'script_context=init'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[4] = 'signal=sigterm'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[5] = 'redirect_gateway=0'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[6] = 'dev_type=tun'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[7] = 'ifconfig_remote=192.168.0.2'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[8] = 'ifconfig_local=192.168.0.1'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[9] = 'config=/etc/openvpn/devops/config'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[10] = 'verb=15'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[11] = 'daemon=0'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[12] = 'daemon_log_redirect=0'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[13] = 'daemon_start_time=1463471367'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[14] = 'daemon_pid=23001'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[15] = 'proto_1=udp'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[16] = 'local_port_1=1196'
May 17 14:49:47 t-xhyve vpn-devops[23001]: ENVP[17] = 'remote_port_1=1196'
May 17 14:49:47 t-xhyve vpn-devops[23001]: PLUGIN_CALL: POST /usr/lib/openvpn/openvpn-plugin-down-root.so/PLUGIN_DOWN status=1
May 17 14:49:47 t-xhyve vpn-devops[23001]: PLUGIN_CALL: plugin function PLUGIN_DOWN failed with status 1: /usr/lib/openvpn/openvpn-plugin-down-root.so
May 17 14:49:47 t-xhyve vpn-devops[23001]: ERROR: up/down plugin call failed
May 17 14:49:47 t-xhyve vpn-devops[23001]: Exiting due to fatal error
May 17 14:49:50 t-xhyve openvpn-devops-upstart: RTNETLINK answers: Operation not permitted
May 17 14:49:50 t-xhyve openvpn-devops-upstart: DOWN-ROOT: Error sending script execution signal to background process
I have some questions:
1. Why OpenVPN still call this?
/sbin/ip addr del dev tun1 local 192.168.0.1 peer 192.168.0.2
2. Why do I got this?
May 17 14:49:47 t-xhyve vpn-devops[23001]: ERROR: up/down plugin call failed
May 17 14:49:47 t-xhyve vpn-devops[23001]: Exiting due to fatal error
May 17 14:49:50 t-xhyve openvpn-devops-upstart: RTNETLINK answers: Operation not permitted
May 17 14:49:50 t-xhyve openvpn-devops-upstart: DOWN-ROOT: Error sending script execution signal to background process
