Steps below are based on FireboxV_12_6_4.ova preparation, for other image deployment, use proper names respectively.

1. Download Latest Watchguard FireboxV OVF Template image. In this how to is used FireboxV_12_6_4.ova image.

https://software.watchguard.com/SoftwareHome

2. SSH to EVE and login as root, from cli and create iage directory:

mkdir /opt/unetlab/addons/qemu/watchguard-12.6.4

3. Upload the downloaded OVA image to the newly created folder /opt/unetlab/addons/qemu/watchguard-12.6.4 using for example FileZilla or WinSCP.

4. Navigate to created folder and extract OVA image, for further use we will need VMDK which is inside OVA.

cd /opt/unetlab/addons/qemu/watchguard-12.6.4
root@eve-ng:/opt/unetlab/addons/qemu/watchguard-12.6.4# tar xvf FireboxV_12_6_4.ova
FireboxV_12_6_4_signed.ovf
FireboxV_12_6_4_signed.mf
FireboxV_12_6_4_signed.cert
FireboxV_12_6_4_signed-disk1.vmdk
root@eve-ng:/opt/unetlab/addons/qemu/watchguard-12.6.4# 

5. Convert vmdk hdd to the qcow2 format.

root@eve-ng:/opt/unetlab/addons/qemu/watchguard-12.6.4# /opt/qemu/bin/qemu-img convert -f vmdk -O qcow2 FireboxV_12_6_4_signed-disk1.vmdk hda.qcow2

6. Delete raw OVA files

root@eve-ng:/opt/unetlab/addons/qemu/watchguard-12.6.4# rm FireboxV*
root@eve-ng:/opt/unetlab/addons/qemu/watchguard-12.6.4# ls
hda.qcow2
root@eve-ng:/opt/unetlab/addons/qemu/watchguard-12.6.4

9. Fix permissions

cd
/opt/unetlab/wrappers/unl_wrapper -a fixpermissions

Username and password for newly created image will be admin/readwrite