question About ipv6

Luis · External Since: May 16, 2006 Posts: 18

hey there friends!
i have some new question , if somebodu can help me here
i have a trouble in my local area computers
i am having trouble to make a connection to the email server using ipv6
addres
example

windows computer when i configure thuntherbird email client to download
email from my server (debian)
mail6.myintranet [2001:b00:f80e:6c00::1]

the windows computer cpu get 99% 88%

however i did the same thing on linux workstation and everything just work
okay

what can be that ?
is that a security trouble on my ipv6 local area network ? or i
missconfigured something in my dns server , because when i start to work
with ipv6 everything apparently was going fine.

what can be that ?
any ideas ?
pls?

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Dominic Hargreaves · External Since: Dec 07, 2004 Posts: 156

On Fri, Mar 09, 2007 at 08:18:06PM -0000, Luis wrote:

> windows computer when i configure thuntherbird email client to download
> email from my server (debian)
> mail6.myintranet [2001:b00:f80e:6c00::1]

Firstly, That IP address is assigned to an Italian network provider. If
you just picked it out of the air you'll likely run into trouble down
the line. If you don't have an IPv6 assignment of your own, you'll
probably want to use link-local addressing (in the fe80:: netblock)

> the windows computer cpu get 99% 88%
>
> however i did the same thing on linux workstation and everything just work
> okay
>
> what can be that ?
> is that a security trouble on my ipv6 local area network ? or i
> missconfigured something in my dns server , because when i start to work
> with ipv6 everything apparently was going fine.

This sounds like a problem with the Windows side of things, so I'm not
sure we will be able to help much, but some basic steps - can you ping6
the server? What about traceroute6? Can you telnet to the mail server
manually from the windows machine? If not what error message do you get?

Dominic.

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Stephane Bortzmeyer · External Since: Nov 24, 2004 Posts: 32

On Sat, Mar 10, 2007 at 01:09:12PM +0000,
Dominic Hargreaves <dom.TakeThisOut@earth.li> wrote
a message of 36 lines which said:

> If you don't have an IPv6 assignment of your own, you'll probably
> want to use link-local addressing (in the fe80:: netblock)

This would prevent it to use routing. And it is painful with tools
that require an explicit interface when using such addresses. It is
much better to use "Unique Local IPv6 Unicast Addresses" (described in
RFC 4193), in the block FC00::/7.

Here is a nice site to get one:

http://www.kame.net/~suz/gen-ula.html

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