Adding routes for 0/1 and 128/1 instead of 0/0 has the same effect of
routing all traffic through VPN tunnel, without the risk of wiping /
messing up with the original gateway.
client% ip tuntap add dev tap10 mode tap
client% ip addr add 172.16.0.2/24 dev tap10
client% ip link set up dev tap10
-client% ip route add default via 172.16.0.1
+client% ip route add 0/1 via 172.16.0.1
+client% ip route add 128/1 via 172.16.0.1
@end verbatim
@strong{Run client daemon itself}: