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Date:      Wed, 03 May 2023 10:46:19 +0000
From:      bugzilla-noreply@freebsd.org
To:        java@FreeBSD.org
Subject:   [Bug 239890] java/openjdk11: openjdk 11.0.4+11.2 JDBC connections fail with IPv6 addresses
Message-ID:  <bug-239890-8522-QxJVl9Wyrh@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-239890-8522@https.bugs.freebsd.org/bugzilla/>
References:  <bug-239890-8522@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D239890

Lapo Luchini <lapo@lapo.it> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lapo@lapo.it

--- Comment #8 from Lapo Luchini <lapo@lapo.it> ---
Seems like this is the only way to have it work with both IPv4 and IPv6 at =
the
same time.

  sudo sysctl net.inet6.ip6.v6only=3D0

It also seems the correct value anyways, but this is just me.

AFAIK (but I'd like more comments on that) this parameter is only safe if t=
his
is added to pf.conf:

  table <v4mapped> const {0:0:0:0:0:FFFF::/96}
  block quick from <v4mapped>
  block quick to <v4mapped>

Context about the security issue:

https://lists.freebsd.org/pipermail/freebsd-net/2013-June/035858.html

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