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Date:      Sun, 15 Aug 2004 22:20:07 +0200
From:      "Simon L. Nielsen" <simon@FreeBSD.org>
To:        Colin Alston <karnaugh@karnaugh.za.net>
Cc:        freebsd-net@freebsd.org
Subject:   Re: [FreeBSD 5.2] Bandwith and packet throttling
Message-ID:  <20040815202006.GI684@arthur.nitro.dk>
In-Reply-To: <411FBF4D.9090706@karnaugh.za.net>
References:  <4a1299a404081414287a9ecbc@mail.gmail.com> <20040815104243.GA43915@shellma.zin.lublin.pl> <4a1299a4040815113178caa332@mail.gmail.com> <411FBF4D.9090706@karnaugh.za.net>

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On 2004.08.15 21:53:49 +0200, Colin Alston wrote:
>=20
> >Thanks for the reply. The ICMP was more experiment than anything, I've
> >sinced removed it. Here are the results of the show commands:
> >
> >cramster# ipfw show
> >00050 14819576  8458459132 divert 8668 ip from any to any via dc0
> >00100      250       32470 allow ip from any to any via lo0
> >00200        0           0 deny ip from any to 127.0.0.0/8
> >00300        0           0 deny ip from 127.0.0.0/8 to any
> >65000 44478701 31835950367 allow ip from any to any
> >65100        0           0 pipe 1 ip from 10.0.0.8 to any
> >65200        0           0 pipe 2 ip from any to 10.0.0.8
> >65535        0           0 deny ip from any to any
> >
> I think you're clearly being a bit silly here.
> Remove rules 00200 and 00300 (I dont know why on this green earth you'd
> deny loopback)

Eh, that's not silly at all; that the default firewall rules from a
stock /etc/rc.firewall on FreeBSD.  Note rule 100 which allows
loopback traffic.  Rule 200/300 just makes sure nobody tries to spoof
loopback traffic from a real network interface.

[simon@arthur:~] sudo ipfw list | head -n 3
00100 allow ip from any to any via lo0
00200 deny ip from any to 127.0.0.0/8
00300 deny ip from 127.0.0.0/8 to any

--=20
Simon L. Nielsen
FreeBSD Documentation Team

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