route

• Deprecated: use ip route
• Routing tables
• Traffic going to any IP not specified in the routing table goes to the default gateway

# list routing tables
route

# list routing table in a namespace
ip netns exec "namespace" "route"

• A destination 0.0.0.0 (default) means destination to any IP

• A gateway 0.0.0.0 means you don't need a gateway (for connections inside the same network)

• By default, package forwarding is not allowed.