OpenBSD 4.4 gnutls-serv IPv6 Only Bug

Peter Hendrickson pdh at
Fri Apr 17 19:20:45 CEST 2009

> From: Simon Josefsson <simon at>
> Peter Hendrickson <pdh at> writes:
>> Using GnuTLS 2.6.5 under OpenBSD 4.4, there is a bug in
>> gnutls-serv.  It only listens for connection on an IPv6 port and
>> ignores all IPv4 requests.  This can be seen by running something
>> as simple as "gnutls-serv --http".  The patch below illustrates the
>> problem and supplies a quick fix.
> Hi.  Thanks for the report.  I'm not sure the patch is the right
> thing, supporting only IPv4 seems like a step backwards.

The patch is *not* the right thing -- I just sent it to illustrate the
problem.  I agree that IPv6 should be supported -- even advocated.

> Isn't there a way to listen on all address families?

"If both IPv4 and IPv6 traffic need to be accepted, listen on two

(According to this man page:

It looks to me like supporting two open sockets would require
substantial code changes.  So, why not just add "--ipv4" and "--ipv6"
switches?  If somebody wants to listen for both types of traffic they
can run two processes.  (I personally wouldn't object if "--ipv6" were
the default, although that would be pushing the envelope.)

And it should also print a message every time which tells the user
which address family it is listening for.  It took me a while to
figure out why it wasn't working -- such a message would have saved me
considerable time.


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