FC1 -> FC2: very slow xDSL connection...

[Andrea Giuliano]

I sure will try to remove ipv6 support! But why my box here at work,
which is running with IPV6 support, is working perfectly?

The difference is that here I'm connected via ethernet, not xDSL... This
is going to be more and more puzzling...

Best regards.

On Fri, 2004-06-25 at 15:34, Andy Green wrote:
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> On Friday 25 June 2004 10:11, antonio montagnani wrote:
> 
> > >>I think you _may_ be hitting the problem with mozilla and IPV6, which is
> > >>turned on by default in FC2. There has been some discussion about this
> > >>last week on the list.
> > >
> > >This sounds interesting. But how can I disable IPv6 to see if it's the
> > >cause? Must I recompile the kernel, or have I just to echo something
> > >somewhere in /proc?
> 
> There's some great advice flying on this thread, I'm sure a solution is coming 
> with a few more iterations :-)
> 
> The IPv6 thing that I have seen is that DNS lookups can favour IPv6 even when 
> there is no ability to route IPv6 "out the door".  You can kill IPv6 (which 
> is completely useless assuming you do not use it on your intranet and cannot 
> send it out on the Internet), by adding
> 
> install ipv6 /bin/true
> 
> to /etc/modprobe.conf.
> 
> These kind of problems, and another stupid problem I once had of setting my 
> private DNS cache IP in /etc/resolv.conf and then taking the machine back to 
> my friend to use on the Internet, show up really clearly if you shine tcpdump 
> on the traffic :-)
> 
> I think trying to discover exactly where the slowness starts to come from will 
> be a good clue.  What I understand so far is that ICMP traffic is fine 
> (ping/traceroute) but www.google.it (tcp) comes up slowly.  You might find it 
> easier to use for example wget -O- www.google.it since this will not try to 
> bring in the graphic.  Why not try that with tcpdump in another window and 
> paste the result.
> 
> - -Andy
> 
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-- 
Andrea Giuliano, Ph. D.
ICCU - Istituto Centrale per il Catalogo Unico
Viale Castro Pretorio 105, Rome - ITALY
Tel. +39064989509, Fax +39064059302