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NIC numbering discrepancies between VMWare and Sophos UTM

I was attempting to upgrade my UTM9 by way of a new VM, config export and import.  The platform is a vCloud Director vAPP (VMWare) provided by UK Cloud.

The environment has 7 VLANs and I created a VM with 8 NICs.  These NICs were numbered sequentially with NIC7 being a test network to allow me to browse to the default IP of the UTM9.  NICs 0-6 were replicated from the Old VM.

When running the VM setup, I picked ETH7 as the NIC to use for management based on my assumption that this would map to NIC7 in VMWare.  I then found that I was unable to access the UTM9 on the address specified.

I then deleted and recreated the storage and then found that there was a function key to drop me to BASH.  upon using IFCONFIG I noted that the MAC for NIC7 in VMWare and ETH7 in Sophos UTM were different and then I realised what the issue was.  THe NIC in the UTM that was on my management LAN was not 7 but 3.

My query is, can I be sure that a configuration exported from my old UTM9 into my new one will work correctly and the right NICs will be assigned to the right networks?



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  • I am trying to remember exactly, but I think nic numbering in the UTM is done based on mac address. Now you can re-order the nics from within the console on a UTM. If you search the hardware forum you might find the command otherwise I will dig through my notes for you.

    XG115W - v20.0.2 MR-2 - Home

    XG on VM 8 - v21 GA

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  • On the existing virtual UTM, the NICs are assigned as follows:

    eth0   Internal
    eth1   Management
    eth2   Production
    eth3   Test
    eth4   Unused
    eth5   VPN DMZ Internal
    eth6   Internet DMZ
    eth7   VPN DMZ External

    Please can you confirm the procedure for ensuring the new virtual UTM takes the same assignments?

Reply
  • On the existing virtual UTM, the NICs are assigned as follows:

    eth0   Internal
    eth1   Management
    eth2   Production
    eth3   Test
    eth4   Unused
    eth5   VPN DMZ Internal
    eth6   Internet DMZ
    eth7   VPN DMZ External

    Please can you confirm the procedure for ensuring the new virtual UTM takes the same assignments?

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  • Hi, Mark, and welcome to the UTM Community!

    You will want to

    edit /etc/udev/rules.d/70-persistent-net.rules

    After you save the file, restart the UTM instance to make your new order take effect.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA