Task: View / Display FreeBSD Routing Table
Use netstat command with -r option:$ netstat -r
$ netstat -rn
Output:
Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 61.221.xx.yy UGS 0 247 em1 10 10.10.110.5 UGS 0 50 em0 10.10.110/26 link#1 UC 0 0 em0 10.10.110.5 00:1b:0d:e6:58:40 UHLW 2 0 em0 1145 61.221.xx.yy/29 link#2 UC 0 0 em1 61.221.xx.yy 00:1b:0d:e6:57:c0 UHLW 2 0 em1 1055 61.221.xx/24 link#2 UC 0 0 em1 127.0.0.1 127.0.0.1 UH 0 0 lo0
The first two line displays default routes.
To just print IPv4 routing table, enter:# netstat -4 -r -n
To just print IPv6 routing table, enter:# netstat -6 -r -n
Task: FreeBSD Set a default route
All network packets that cannot be sent according to the previous entries of the routing table are sent through the following default gateway:# route add default 192.168.1.254
How do I save routing information to a configuration file?
If you reboot FreeBSD box, the routing configuration will be lost i.e. the routing information will not persist. You need to edit /etc/rc.conf file to set defaultroute:# vi /etc/rc.conf
Set default route by editing defaultrouter variable:defaultrouter="192.168.1.254"
Save and close the file.
Task: Start and Stop FreeBSD Configured Interfaces
To apply changes to a configuration file, you need to stop and restart the corresponding FreeBSD networking interface. The following command will also update routing information:# /etc/rc.d/netif restart
# /etc/rc.d/routing restart
OR# service netif restart
# service routing restart
How can I change or the default gateway from the FreeBSD CLI?
Use the following commands:### [ delete the default route/gateway ] ###
# route del default
### [ now setup 192.168.1.254 as the default gateway for my FreeBSD box ] ###
route add default 192.168.1.254
Verify it:# netstat -r -n