禁用IPv6
/etc/src.conf 文件中添加参数
WITHOUT_IPV6="YES"
jails 启用IPv6
rc.conf中参数
修改
ipv6_activate_all_interfaces="YES" rtsold_enable="YES"
到
ifconfig_epair0b_ipv6="inet6 accept_rtadv auto_linklocal"
相关资料：
https://forums.freebsd.org/threads/completely-disable-ipv6-in-freebsd-10.50569/
https://www.ixsystems.com/community/threads/iocage-and-ipv6-autoconf.61700/