Re: [gentoo-user] the user mode linux can't access network..

[fei huang]

On 8/21/06, Etaoin Shrdlu <shrdlu@×××××××××××××.org> wrote:
>
> On Monday 21 August 2006 16:22, fei huang wrote:
>
> > still no luck... I tried to build everything in kernel, and later
> > build additional iptable_filter as module, add iptable to my default
> > run level,, neither of them works..
>
> I'd try first with iptables filters *disabled*, to make sure it's not a
> firewall issue. Once it works, enable packet filtering (if you need it).
> But until you are sure it works, make sure nothing prevents traffic
> flow, so disable iptables filters.


mm, I  disabled it from  auto  loading.

> I found there is a warning message after emerge iptables says: ip
> > forwarding is not included in iptables any more. what does it mean? is
> > that related with the issue?
>
> It means that, if you want ip forwarding, you have to enable it manually
> using the command
>
> echo 1 > /proc/sys/net/ipv4/ip_forward
>
> To verify that forwarding is working, simply do
>
> cat /proc/sys/net/ipv4/ip_forward
>
> and it should print "1".
> Keep in mind that if you reboot, you have to re-enable forwarding if you
> want it again.


gentoo might do that trick for me, everytime I  check  that value, it shows
1.

Finally, run a network analyzer like wireshark and see for yourself
> what's happening. I'd look at ARP packets first: make sure ARP is
> working correctly.
> --
> gentoo-user@g.o mailing list


uh, that's a good idea, I'll emege wireshark and see what's happening, the
most annoying thing is that there's no log for troubleshooting, I wonder why
iptable never write anything to syslog?  that's wierd.


regards

daniel