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Пример содержимого /etc/rc.conf хоста

...
defaultrouter="А.В.С.У"
hostname="Name.ru"
ifconfig_bge0="inet 1.1.1.1 netmask 255.255.255.224"
ifconfig_bge1_alias0="inet 2.2.2.2 netmask 255.255.255.255" # Jail #1
ifconfig_bge1_alias1="inet 3.3.3.3 netmask 255.255.255.255" # Jail #2
...

jail_enable="YES"
jail_list=""


jail_list="$jail_list jail1"
jail_jail1_hostname="jail1.ru"
jail_jail1_ip="2.2.2.2"
jail_jail1_rootdir="/usr/local/jail/${jail_jail1_ip}"
jail_jail1_devfs_enable=YES
jail_jail1_devfs_ruleset="devfsrules_jail_strict"


jail_list="$jail_list jail2"
jail_jail2_hostname="jail2.ru"
jail_jail2_ip="3.3.3.3"
jail_jail2_rootdir="/usr/local/jail/${jail_jail2_ip}"
jail_jail2_devfs_enable=YES
jail_jail2_devfs_ruleset="devfsrules_jail_strict"