I'm not very good at setting up TrueNAS, so forgive me for possible mistakes)
I had to setup OpenVPN and followed these tutorials:
www.youtube.com
www.youtube.com
I completed all steps, VPN is working but when I added tunable: natd_interface==re0 (the only network interface) all my jails can't get their local IPs. In plugins menu I'm getting IPs like 0.0.0.0, and in 3-5 minutes plugins get down. When I disable natd_interface plugins working normal, but I can access only TrueNAS UI.
What could be the reason and how to fix it?
I had to setup OpenVPN and followed these tutorials:

How to Configure OpenVPN on TrueNas 12 - Setup your own Home VPN - Part 1
Configure and setup OpenVPN without a Jail on TrueNas 12 and allow remote access connections to the TrueNas Subnet or just to the TrueNas system itself safel...


How to Configure OpenVPN on TrueNas 12 - Setup your own Home VPN - Part 2
Part 2 of the TrueNAS OpenVPN Server. We look at how to limit access to the VPN servers Subnet / Network, Allow Internet access through the VPN and Limit sub...

I completed all steps, VPN is working but when I added tunable: natd_interface==re0 (the only network interface) all my jails can't get their local IPs. In plugins menu I'm getting IPs like 0.0.0.0, and in 3-5 minutes plugins get down. When I disable natd_interface plugins working normal, but I can access only TrueNAS UI.
What could be the reason and how to fix it?