We have a mix of Asus Chromeboxes 4 with 4.19 kernel and Pixelbooks with 5.4 kernel (older device but newer kernel).
I’m looking for a way to replace Cisco AnyConnect. I tried native Wireguard which is not available on 4.19 and is grayed out connect on 5.4. Since we have <5 machines who need VPN, maybe getting newer hardware for Wireguard would work.
I also tried native OpenVPN but Mikrotik router on the other end is really not good with OpenVPN, so I think there will be trouble getting this to work reliably.
What are other VPN options to connect to internal servers from outside?