FC1 -> FC2: very slow xDSL connection...
Andy Green
fedora at warmcat.com
Fri Jun 25 13:34:41 UTC 2004
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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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