Can't login via WebGui (connection timed out) (16.5.6 > 17.0 Beta 1)

I have a CR50iNG that was previously running Cyberoam Firmware.

 

I updated to v16.5 MR6 a few weeks ago and migrated the config.

I've just installed HW-SFOS_17.0.0_Beta-1.SF210-32.gpg and now I can't access the WebGUI, nor ping the device.

 

I've connected a serial cable up, and can see that all interfaces currently have their correct IP configurations.

I've reset the admin password (it's still: admin)

I've attached a laptop to a LAN port, and can't see any information coming from their device. Using wireshark, the only information I can see is an ARP request goes out "who has 192.x.x.x" and I get the ARP back from the device saying the correct MAC address.

I've also got a port connected as a DMZ that allowed remote access previously and this also does nothing.

I ran the serial command:

system appliance_access enable -> https://community.sophos.com/kb/en-us/123542

This didn't affect any interfaces!

 

Some important notes:

The configuration loaded on this device is VERY complicated

The LAN port has 3 aliases, and around 10 VLANs associated

The DMZ port has no VLANs/aliases

The WAN port has about 120 aliases defined

The MAC address has been OVERRIDDEN on interfaces. This configuration is from a previously HA device.

The configuration, as mentioned, has come from CROS, to SFOS16.5 and now to SFOS17

 

Any hints? Or am I BETA testing a bit too much...