Routing lookups taking too long? Network link saturated? Use this one!
ip rule add to 0.0.0.0/0 unreachable
What it does
This one adds a (temporary) policy based routing rule. This rules says: “For
packets destined for
0.0.0.0/0 (the entire IPV4 address space), return a
destination unreachable error.
Why it works
If packets don’t get routed, they won’t saturate your link!