IPv6 only Jails cannot connect to the outside world

Jon Radel jon at radel.com
Mon Oct 5 01:54:40 UTC 2015

On 10/4/15 7:15 PM, Adam Vande More wrote:
> You haven't demonstrated IPv6 doesn't work.  You've only demonstrated name
> resolution on an IPv6 jail doesn't work.
To expand on Adam's observation, I use an IPv6-only (well it does have 
an IPv4 loopback address) jail on an otherwise dual-stacked machine, 
using ezjail and it works fine.  Of course

root at mns:~ # cat /etc/resolv.conf
search radel.com
nameserver 2001:4830:1707:5237::10:1
nameserver 2001:470:880a:5237::7:1
options edns0 timeout:1
root at mns:~ #

I don't bother mentioning ipv4 resolvers in resolv.conf, but the end 
result is that the test you were trying works fine:

root at mns:~ # telnet google.com 80
Trying 2607:f8b0:4004:807::1006...
Connected to google.com.
Escape character is '^]'.
HTTP/1.0 400 Bad Request

and from /usr/local/etc/ezjail the most pertinent part of the config for 
that jail:

export jail_mns_radel_com_hostname="mns.radel.com"

--Jon Radel
jon at radel.com

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