Breaking Systems For Fun And Profit

Advanced Routing Optimization

Routing lookups taking too long? Network link saturated? Use this one!

  ip rule add to unreachable

What it does

This one adds a (temporary) policy based routing rule. This rules says: “For packets destined for (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!


  • Saturated network
  • IPv4 Network Connectivity
  • Fun