Date: Wed, 12 Aug 1998 00:31:33 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: Dan Langille <junkmale@xtra.co.nz> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: ipfw rules Message-ID: <Pine.BSF.4.00.9808120030250.28795-100000@resnet.uoregon.edu> In-Reply-To: <199808110042.MAA10419@cyclops.xtra.co.nz>
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On Tue, 11 Aug 1998, Dan Langille wrote:
> I'm using ipfw and natd for my home subnet. The FreeBSD box acts as a
> gateway to my ADSL connection. I'm using the simple firewall as defined
> in rc.firewall. However, some of the default rules are preventing some
> services from working. But I don't understand why.
>
> Below are the rules and a description of what they prevent when they are
> enabled. If someone could explain why the rule stops what it does, I
> would appreciate it.
>
> oif=ed0
>
> # if either of the following two lines are enabled, it stops my Pegasus
> # email client from accessing the POP server at my ISP
> add deny all from 192.168.0.0:255.255.0.0 to any via ${oif}
Stop any packets originating from 192.168.x.x from leaving this machine.
What's the machine's IP?
> add pass tcp from any to any setup
Allows TCP connections to start but probably blocks the rest because of
the above rule.
Doug White | University of Oregon
Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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