====== Linux Policy Routing ======

Create a custom routing table

<code>
echo 200 custom >> /etc/iproute2/rt_tables
</code>

Route a source IP using the custom table

<code>
ip rule add from 172.21.4.156 lookup custom
</code>

Add a rule to the table that change the default gateway to a VPN

<code>
ip route add default via 172.27.0.9 dev tun0 table custom
</code>