Is it possible to enable duplicate-cn on Nethserver? I often connect my phone and several desktops at the same time. However, whenever the second connection is established, the previous connection is dropped.
Alternately, I am experimenting with VPN-Only accounts. However, I am unable to figure out how to set a username/password for those accounts. Do I need to switch the vpn server over to certificate-only authentication to use these accounts?
I suggest you to not use duplicate-cn.
If desktops are in the same subnet, consider for an endpoint VPN into that subnet (another nethserver via IPsec, for example, or a cheap IPSec-enable router).
Or create one account for every device you need for connect to your NethServer.
Another way could be use the other way around: are the applications that you are using possibly being secured with an higher-security protocol?