On Fri, 2004-06-25 at 06:34, 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.
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 :-)
You are right.. Just look at these tcpdump rates. (crtl-C after 5 secs)
with Hostname resolving, a 5 sec capture will only capture 3 packets.
1 packets captured
1922 packets received by filter
1798 packets dropped by kernel
W/o Hostname resolving, this turns out to be like 100+ packets.
245 packets captured
249 packets received by filter
0 packets dropped by kernel
Just Look at the Dropped Packets!!
I've not tried rebooting with that line yet.. But I expect good news