Web interface for OpenVPN server crashes when user database is removed

[cotosso]

Steps to Reproduce

• Connect a firewall to a remote user database.
• Create a RoadWarrior server using that user database.
• Create VPN accounts.
• Remove the user database.

Expected Behavior
The system should prevent the removal of a user database if it is actively used by a service.

Actual Behavior
The web interface of the OpenVPN server crashes. Specifically, the ns.ovpnrw list-users command fails. It becomes impossible to manage or repair the VPN server from the interface.

Proposed Solution
Implement a check to prevent the removal of user databases if a service such as OpenVPN is actively utilizing it.

Components
NethSecurity 8 23.05.5-ns.1.4.1

[gsanchietti]

Testing image.

Test case
Check the issue is not reproducible

[cotosso]

The bug is not reproducible