How to configure a FreeBSD 11 Jail with vnet and ZFS

To configure a FreeBSD 11 jail with vnet (Virtual Network) and ZFS (Z File System), you will need to perform the following steps:

1. Install and configure the ZFS file system on your FreeBSD host system.

2. Create a ZFS dataset for your jail. This will be the root filesystem for the jail.

3. Enable the vnet jail support in the FreeBSD kernel by adding the following line to your /etc/rc.conf file:

jail_enable="YES"

4. Create a configuration file for your jail in the /etc/jail directory. The configuration file should include the following options:

path = /zfs/jails/<jailname>
host.hostname = <jailname>.example.com
ip4.addr = <ip address>/24
interface = vnet<jailnumber>
vnet = new

5. Start the jail using the jail command:

jail -c path=/zfs/jails/<jailname> host.hostname=<jailname>.example.com ip4.addr=<ip address>/24 interface=vnet<jailnumber> vnet=new

6. Once the jail is started, you can log in to the jail and configure it as you would any other FreeBSD system.

For more detailed instructions and additional options, you can refer to the FreeBSD documentation on jails and vnet at: https://www.freebsd.org/doc/handbook/jails.html