The Itus Shield has been updated on OpenWrt to support the 5.10 LTS kernel. I am currently running the OpenWrt master branch on the Linux 5.15 kernel.
While OpenWrt only supports the (R)outer slot, my personal repo has re-enabled the (B)ridge and (G)ateway slots. If anyone wants a custom image for those slots, or the commit to re-enable those slots for their own build, feel free to ask.
I have a working rust-lang implementation that I'm working to incorporate into OpenWrt's build system. This allows for rust-lang packages, including Suricata 6, to be used.
I have incorporated RAM Swap in my images along with zstd compression, which significantly increases the usable RAM footprint.
root@OpenWrt:/# uname -a
Linux OpenWrt 5.15.31 #0 SMP Sun Apr 3 05:52:36 2022 mips64 GNU/Linux
total used free shared buff/cache available
Mem: 965972 45860 889788 1224 30324 879788
Swap: 652028 0 652028
Additionally, OpenWrt master branch has moved to Firewall4, and can I can demonstrate full throughput through the WAN ports. This is (surprisingly) the case even through Suricata 6, with almost no loss of speed even though it is inspecting the packets. This in through my local network BUT out the WAN port.
Regardless of what failings Itus Network's had, the hardware wasn't one of them.
This is still one of the most powerful non-commercial devices out there (even in 2022, though the gap has closed) for hardware specs. I did just have the wall-wart die on me, so I had to replace it, but other than that, they have been solid (and nearly unbrickable provided you have a console cable).
Just as a follow-up. For those who still own the hardware, but don't actively use it as a router, I got bored enough to sit down and turn one of my Itus boxes into a L2 managed Switch. In theory, you could setup VLANs, but I didn't bother.
Eth0/Eth1/Eth2 are all bridged
With Suricata 6.0.4 running on the device. Not the fastest I've gotten on the box, but it is will Suricata looking at everything that comes through against whatever the public Rule-sets available are. I should also mention that my device I'm running this Speedtest from goes thru 4 routers/switches just to get outside my LAN, so I'm sure I could get more performance if I cut some of that out. So, if you have a Shield and don't need a router, but might be able to use a VLAN-Aware switch, well, there's hope yet!