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From: Per Lundberg on 29 May 2010 16:40
On Sat, May 29, 2010 at 10:54 PM, Julien Cristau <jcristau(a)debian.org> wrote:

Hi Julien,

> I'm fairly sure xdmcp over ipv4 works just fine with both xdm and gdm in
> squeeze, because I tested them (and made them work with the bindv6only=1
> setting) a month or two ago.

OK, that's interesting... Just for the sake of it, I even tried
enabling the bindv6only (net.ipv6.bindv6only=1) setting, to see if it
would make any difference. Negative; it still only binds to the udp6
socket.

per(a)terah:/etc/sysctl.d$ sudo netstat -l -n -p | grep 177
udp6 0 0 :::177 :::*
1632/xdm

Do you have any active XDM setup where you could try this yourself? As
I hinted in my previous email, I'm not 100% sure of this, but doesn't
the above udp6 line mean that it will *only* work from an ipv6-capable
client...?
--
Best regards,
Per Lundberg


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From: Per Lundberg on 29 May 2010 17:20
On Sat, May 29, 2010 at 11:22 PM, Julien Cristau <jcristau(a)debian.org> wrote:
> On Sat, May 29, 2010 at 23:16:06 +0300, Per Lundberg wrote:
>> per(a)terah:/etc/sysctl.d$ sudo netstat -l -n -p | grep 177
>> udp6       0      0 :::177                  :::*
>>          1632/xdm
>>
> That's fine, bind() on in6addr_any lets you receive ipv4 packets when
> IPV6_V6ONLY is turned off (which xdm does even if the system default is
> backwards).

You were right - thanks! It turned out that I needed to modify the
/etc/X11/xdm/Xaccess file to be able to give the client the right to
use the login daemon... Now, it worked better. :-)
--
Best regards,
Per Lundberg


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