Can anyone recommend a good, preferably free, VPN which wil work on a Snow Leopard iMac? It has little traffic these days but I would like some protection.

I use Freedome on my current Catalina iMac, iPad and iPhone but they don’t seem to support the older OS nor have I been able to find one that does.

Can anyone recommend one?

Thanks in advance.

iMac (Retina 5K, 27-inch, 2017); 3.8 GHz Intel Core i5; 2TB HD; 64 GB 2400 MHz DDR4 RAM; Radeon Pro 580 8 GB. iPad Pro 10.5" Model MPME2B/A with 512GB capacity; iPhone SE 2020 256GB