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From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: Curious ping problem with no FW
Date: Wed, 23 Jul 2008 22:14:54 +0100
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On Tuesday 22 July 2008, Harry Putnam wrote:
> Mick <michaelkintzios@gmail.com> writes:
> > It may be worth checking your router's firewall rules once more. Is the
> > gentoo box connected to the router in the same fashion as the MSWindows
> > boxen, or is it in some funny DMZ set up?
>
> The section involving blocking has nothing whatever set.
OK, but is NATing configured the same way for both Linux & MS Windows=20
machines?
> > What do the firewall logs show?
>
> Since there is nothing outgoing set to log, it says nothing.
Does your router give you the option to log outgoing packets, or monitor th=
em=20
in real time?
> Here I see:
> sysctl -a|grep 'net.*icmp'
>
> net.ipv4.icmp_echo_ignore_all =3D 0
That's how it should be if you want your Linux box to respond to pings.
> net.ipv4.icmp_echo_ignore_broadcasts =3D 1
> net.ipv4.icmp_ignore_bogus_error_responses =3D 1
> net.ipv4.icmp_errors_use_inbound_ifaddr =3D 0
> net.ipv4.icmp_ratelimit =3D 250
> net.ipv4.icmp_ratemask =3D 6168
Nothing amiss here either.
Have you tried going back to basics: unplug the MSWindows box from your=20
router and plug your Linux box in the same port to see if you can ping=20
internet addresses.
Can you ping the IP address of ftp.ucsb.edu; i.e. 128.111.24.43 (although I=
=20
would expect that if your linux had DSN problems you wouldn't be able to=20
browse from it altogether.
What does traceroute show and how does this compare with traceroute -T?=20
=2D-=20
Regards,
Mick
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