FreeBSD Networking
FreeBSD configures networking a little differently than Linux-based operating systems, which often
(but not always) use NetworkManager.
Find network devices
Use the command pciconf -lv | grep -A1 -B3 network to get a high-level overview of what your network devices are. Linux will often (again, not
always) give these names like eth0, eth1, eth2, and so on, for ethernet. FreeBSD is more likely to use initials based on the vendor's name, like re0 would be RealTek and igb0
would be a 1 Gbps Intel card.
Like Linux and other UNIX-like operating systems, the ifconfig command should show you the running configuration.
DCHP client configuration
If you're an end user, this is likely the way you want to configure your FreeBSD host. In most cases, you only need one command to be up and running.
dhclient ix0 – use dhclient to connect using ix0
To make the connection persist and come up automatically at the next reboot, run:
sysrc ifconfig_ix0="DHCP" – adds the configuration to /etc/rc.conf
Basic static IP configuration
Much of the basic system configuration on a FreeBSD machine happens in /etc/rc.conf.
| Command |
Explanation |
| ifconfig ix0 inet 192.168.1.10/24 |
Set ix0 interface to use the IP address 192.168.1.10 |
| sysrc ifconfig_ix0="inet 192.168.1.10 netmask 255.255.255.0" |
Set the above to persist accross reboots |
| sysrc defaultrouter="192.168.1.1" |
Set the default route in /etc/rc.conf to 192.168.1.1 |
| service netif restart && service routing restart |
Reset network interfaces and routing process |
You will also want to add DNS servers to /etc/resolv.conf. Edit the file and add lines like:
nameserver 8.8.8.8 #primary Google public nameserver
nameserver 8.8.4.4 #secondary Google public nameserver
These might be Internet-provider assigned, or you can use various publicly available resolvers (1.1.1.1 is also popular).
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