While configuring ports and physical cables on Kerio Control NG511 hardware box, the default WAN (Internet) interface is not being assigned as eth0. There is a naming discrepancy in Mac addresses of eth0 reported from Webadmin and on the physical device itself.
- The 8-port group on the right is always connected to the first PCI bridge of the motherboard. That is, these 8 ports have always lower PCI bus addresses compared with the other 6-port group.
- Linux udev system automatically assigns "ethX" labels starting from the port having the lowest bus address.
- So, labels are always starting from 0 (zero) on the 8-port group.
- The first port on the front panel having the label "Internet" is always assigned as "eth8" which is the 9th in the order.
- Kerio Control selects the "first" port as one having the lowest MAC address.
In brief, the hardware design of the NG511 box results in the 8-port group appears in the front (eth0-eth7) and the other 6-port group next (eth8-eth13). You can still change "ethX" labeling by modifying the "/etc/iftab" file.
- Login to the Kerio Control via SSH or serial console.
- Make the system read-writable by executing the following command:
mount -o remount,rw /
- Open the
/etc/iftabusing Nano or Vim. Switch the eth0 and ethX (in this case eth0 and eth8) Mac addresses and save the changes.
- Reboot Kerio Control.
Important: the software fix for the incorrect labeling is expected to be released by the end of Q4 2020.