An odd IPv6 application issue

[Francois Tigeot]

On Sat, Dec 11, 2010 at 12:42:32PM -0800, George Bonser wrote:
> > 
> > This sounds like an operating system bug — mapped addresses are never
> > supposed to be seen on the wire. What operating system is this?
> 
> Actually, I wonder if /proc/sys/net/ipv6/bindv6only might be of some help here.

There's a long standing bug/feature with the jdk and bindv6only:

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342561
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6882910

The end result is, with an operating system which uses bindv6only=1, you
can only use IPv4 *or* IPv6, not both.

bindv6only=1 is the default on all BSD systems and at least recent versions
of Debian.

-- 
Francois Tigeot