Example from a Linux box using VPN that gets external access:

# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.254.29.2     *               255.255.255.255 UH    0      0        0 tun0
70.98.67.208    *               255.255.255.252 U     0      0        0 eth2
192.168.1.0     *               255.255.255.0   U     0      0        0 eth1
192.168.0.0     *               255.255.255.0   U     0      0        0 eth0
10.254.29.0     10.254.29.2     255.255.255.0   UG    0      0        0 tun0
default         static-70-98-67 0.0.0.0         UG    0      0        0 eth2



Example from a FreeBSD box using a VPN which cannot get outside access:

# netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            172.16.0.1         UGS         0  5455534    xl0
10.8/24            10.8.0.2           UGS         0        0   tun0
10.8.0.2           10.8.0.1           UH          1        0   tun0
127.0.0.1          127.0.0.1          UH          0  2687653    lo0
172.16             link#1             UC          0        0    xl0
172.16.0.1         00:01:03:d2:d9:ce  UHLW        2    11712    xl0    845
172.16.22.20       00:50:2c:05:a4:86  UHLW        1 33480925    xl0    215
172.16.22.40       00:10:4b:2b:90:74  UHLW        1  1851291    lo0
172.16.66.66       00:50:2c:05:5b:3f  UHLW        1   337002    xl0    683
172.16.198.252     00:0c:29:2c:6e:7a  UHLW        1    30762    xl0   1112
172.16.255.255     ff:ff:ff:ff:ff:ff  UHLWb       1    95692    xl0