SOLVED VNET Jail on different subnet than host

[leonardorame]

I'm trying to create a jail with vnet enabled, host IP is 192.168.1.155 on re0 and I would like the jail's ip 172.16.1.100.

My host is a TrueNAS-12.0-RELEASE.

Here's my config:

When I try to start the jail from de UI I get: Error: [EFAULT] Stopped PostgreSql due to VNET failure

Can you help me with this?

 

[pschatz100]

The IP address and default gateway have to be on the same network.

It is technically possible to create a jail on another network as you want, but the actual setup requires some advanced networking skill - which is beyond the scope of this forum.

 

[leonardorame]

I was confused about networking in jails. I thought jails needed an IP, but finally I created one inheriting the ipv4 from the host.

 

[pschatz100]

Glad you worked through your problem. Sometimes, it makes sense to create a unique IP address for a jail - other times it doesn't matter. It really depends upon what you are doing.

But, unless you are prepared to set up some complex networking, even a unique IP address will be on the same network as the main system.