cheat.sheets:route
# route
# Display or modify the IP routing table.
# Display the IP routing table
route
# Add a new route to a specific network
route add -net {network} netmask {netmask} gw {gateway} {interface}
# Add a default gateway
route add default gw {gateway} {interface}
# Delete a route to a specific network
route del -net {network} netmask {netmask} gw {gateway} {interface}
# Delete the default gateway
route del default
# Add a route to a host
route add -host {destination-host} gw {gateway} {interface}
# Change the metric of a route
route change -net {network} netmask {netmask} gw {gateway} {interface} metric {metric}
# Show the routing table continuously with a delay
watch -n 1 route -n
cheat:route
---
tags: [ networking ]
---
# To display routing table IP addresses instead of host names:
route -n
# To add a default gateway:
route add default gateway 192.168.0.1
# To add the normal loopback entry, using netmask 255.0.0.0 and associated with
# the "lo" device (assuming this device was previously set up correctly with
# ifconfig(8)):
route add -net 127.0.0.0 netmask 255.0.0.0 dev lo
# To add a route to the local network 192.56.76.x via "eth0". The word "dev" can be omitted here:
route add -net 192.56.76.0 netmask 255.255.255.0 dev eth0
# To delete the current default route, which is labeled "default" or 0.0.0.0 in the destination field of the current routing table:
route del default
# To add a default route (which will be used if no other route matches). All
# packets using this route will be gatewayed through "mango-gw". The device
# which will actually be used for that route depends on how we can reach
# "mango-gw" - the static route to "mango-gw" will have to be set up before:
route add default gw mango-gw
# To add the route to the "ipx4" host via the SLIP interface (assuming that "ipx4" is the SLIP host):
route add ipx4 sl0
# To add the net "192.57.66.x" to be gateway through the former route to the SLIP interface:
route add -net 192.57.66.0 netmask 255.255.255.0 gw ipx4
# To install a rejecting route for the private network "10.x.x.x.":
route add -net 10.0.0.0 netmask 255.0.0.0 reject
# This is an obscure one documented so people know how to do it. This sets all
# of the class D (multicast) IP routes to go via "eth0". This is the correct
# normal configuration line with a multicasting kernel:
route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
tldr:route
# route
# Use route cmd to set the route table.
# More information: <https://manned.org/route>.
# Display the information of route table:
route -n
# Add route rule:
sudo route add -net ip_address netmask netmask_address gw gw_address
# Delete route rule:
sudo route del -net ip_address netmask netmask_address dev gw_address
$
cheat.sh