FreeBSD: HowTo Change IP Address / Setup New IP Address For Existing Interface

last updated in Categories FreeBSD

In this quick post I will explain how to add and configuring a network card under FreeBSD operating system using command line options.

To display the current configuration for the network interfaces on your FreeBSD server, type the following command:
# ifconfig

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How Do I Configure the Network Card Under FreeBSD?

You need to use the ifconfig command as follows to assign an IP address:
# ifconfig interfaceName inet IPAddress

To assign an ip to lnc0 interface, enter:
# ifconfig lnc0 inet 202.54.1.22

Please note that lnc0 is an ethernet interface name. It can be Obtained by tying the following command:
# ifconfig -a

FreeBSD Ntwork Card’s Configuration

To setup up ip address permanently open a file called /etc/rc.conf and append/modify network entries as follows:
# vi /etc/rc.conf
Setup values as follows:
hostname="fbsdx.test.com"
ifconfig_lnc0="inet 192.168.0.6 netmask 255.255.255.0"
### Default gateway ###
defaultrouter="192.168.0.254"

Save and close the file. Please note that ifconfig_lnc0 is Ethernet interface name. It can be Obtained using ifconfig -a command.

You can restart networking service using the following command:
# /etc/rc.d/netif restart && /etc/rc.d/routing restart

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Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.


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11 comment

  2. Could you please set up an .exe file to do the above procedure
    I think making a .exe file with the above commands will make the job easier for repeatedly changing ip addresses

    Reply

  7. Friggen windows nerds with your exe and bat files. However can you create a vbs script perhaps. I like the idea of changing the IP address easily from script. vbs would be nice.

    Reply

  8. I’m VERY much a beginner with *nix of ANY form [including FreeBSD] AND I can’t spell, but….

    .EXE and .BAT are NOT from Windows. They are from the days of DOS, which was usable within Windows….

    He is using a term he [and you] understood from his DOS [Windows] experience…

    Reply

  11. making a binary for this seems a little overkill.
    try
    alias setnet ‘ee /etc/rc.conf’
    alias restartnet ‘/etc/rc.d/netif restart && /etc/rc.d/routing restart’

    (I know, ee; I just do not want to relearn vi at my age.)

    Reply

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