tldr/pages/linux/ip-rule.md

ip rule

IP routing policy database management. More information: https://manned.org/ip-rule.

• Display the routing policy:

ip {{[ru|rule]}}

• Create a new generic routing rule with a higher priority than main:

sudo ip {{[ru|rule]}} {{[a|add]}} from all lookup {{100}}

• Add a new rule based on packet source addresses:

sudo ip {{[ru|rule]}} {{[a|add]}} from {{192.168.178.2/32}}

• Add a new rule based on packet destination addresses:

sudo ip {{[ru|rule]}} {{[a|add]}} to {{192.168.178.2/32}}

• Delete a rule based on packet source addresses:

sudo ip {{[ru|rule]}} {{[d|delete]}} from {{192.168.178.2/32}}

• Remove all routing rules:

sudo ip {{[ru|rule]}} {{[f|flush]}}

• Save all rules to a file:

ip {{[ru|rule]}} {{[s|save]}} > {{path/to/ip_rules.dat}}

• Restore all rules from a file:

sudo ip {{[ru|rule]}} {{[r|restore]}} < {{path/to/ip_rules.dat}}