Tag Archives: system.cfg

Change Static IP on AirFiber over SSH

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Log into device

SSH into AirFiber

ssh ubnt@192.168.1.20

Modify config file

Open up the “/tmp/system.cfg” configuration file

vi /tmp/system.cfg

Find the line that has the ip address and modify the address.
Note that you’ll need to hit i to enter text if you are using vi

...
netconf.3.hwaddr.status=disabled
netconf.3.ip=192.168.1.10   <-- Change IP here
netconf.3.mtu=1500 
...

Save file by hitting the esc key then type :x and then hit Enter

Save changes and reboot

Now run the following command to write the changes to the device. Once it comes back up it should have the new IP address from the config file.

cfgmtd -f /tmp/system.cfg -w && reboot

Ubiquiti set DHCP from command line

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Edit the “/tmp/system.cfg”

Change the line that contains “dhcpc.status=disabled” to

dhcpc.status=enabled

add the following lines

dhcpc.1.devname=br0         
dhcpc.1.fallback=192.168.1.20
dhcpc.1.fallback_netmask=255.255.255.0
dhcpc.1.status=enabled

Save and exit and save changes

/usr/etc/rc.d/rc.softrestart save

Log into the GUI and verify everything looks correct. Under the network tab it was still showing that it had a static address, although it pulled a DHCP IP.