до подключения 

[root@LinuxUser ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 brd 127.255.255.255 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 00:1b:fc:6e:84:1e brd ff:ff:ff:ff:ff:ff
    inet 10.0.5.120/16 brd 10.0.255.255 scope global eth0
3: vboxnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
[root@LinuxUser ~]# ip r
192.168.0.0/24 via 10.0.3.243 dev eth0 
10.0.0.0/16 dev eth0  proto kernel  scope link  src 10.0.5.120  metric 1 
default via 10.0.0.1 dev eth0  proto static 


при включенном VPN
[root@LinuxUser ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 brd 127.255.255.255 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 00:1b:fc:6e:84:1e brd ff:ff:ff:ff:ff:ff
    inet 10.0.5.120/16 brd 10.0.255.255 scope global eth0
3: vboxnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff
4: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1400 qdisc pfifo_fast state UNKNOWN qlen 3
    link/ppp 
    inet 192.168.209.33 peer 192.168.101.1/32 scope global ppp0
[root@LinuxUser ~]# ip r
10.0.0.1 dev eth0  proto static  scope link 
10.0.0.1 dev eth0  scope link  src 10.0.5.120 
192.168.101.1 dev ppp0  proto kernel  scope link  src 192.168.209.33 
192.168.0.0/24 via 10.0.3.243 dev eth0 
10.0.0.0/16 dev eth0  proto kernel  scope link  src 10.0.5.120  metric 1 
default dev ppp0  proto static 

после отключения VPN
[root@LinuxUser ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 brd 127.255.255.255 scope host lo
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ether 00:1b:fc:6e:84:1e brd ff:ff:ff:ff:ff:ff
    inet 10.0.5.120/16 brd 10.0.255.255 scope global eth0                                                             
3: vboxnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000                                           
    link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff                                                                
[root@LinuxUser ~]# ip r
10.0.0.1 dev eth0  scope link  src 10.0.5.120 
192.168.0.0/24 via 10.0.3.243 dev eth0 
10.0.0.0/16 dev eth0  proto kernel  scope link  src 10.0.5.120  metric 1 
default via 10.0.0.1 dev eth0  proto static