Re: about ipfw
From: Joseph (jolt@nicholasofmyra.org)
Date: 12/19/01
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From: "Joseph" <jolt@nicholasofmyra.org> To: <slack@suntop-cn.com>, <freebsd-security@FreeBSD.ORG> Date: Wed, 19 Dec 2001 08:47:45 -0500
This is certainly a FreeBSD-security question. You are missing a "from".
Also, try allow instead of pass.
ipfw add allow all from any to any via lo in
ipfw add allow all from any to any via lo out
----- Original Message -----
From: <slack@suntop-cn.com>
To: <freebsd-security@FreeBSD.ORG>
Sent: Tuesday, December 18, 2001 3:44 PM
Subject: about ipfw
> 1. can ipfw do a TCP keep-state ?
> 2. how keep-state combine with "via interface" ?
> 3. this ipfw rules don't work: why ?
> ipfw add pass all any to any via lo
> ipfw add pass all any to any via ${iif}
> ipfw add divert natd all from any to any via ${oif}
> # Allow TCP through if setup succeeded
> ipfw add check-state
> ${fwcmd} add deny tcp from any to any established
>
> # Allow IP fragments to pass through
> ${fwcmd} add deny all from any to any via ${oif} frag
>
> # Allow icmp 0 3 8 11 pass
> ${fwcmd} add pass icmp from any to any via ${oif} icmptypes 0,3,8,11
>
> # Reject&Log all setup of incoming connections from the outside
> ${fwcmd} add deny log tcp from any to any in via ${oif} setup
>
> # Allow setup of any other TCP connection
> ${fwcmd} add pass tcp from any to any out via ${oif} setup keep-state
>
> # Allow DNS queries out in the world
> ${fwcmd} add pass udp from ${oip} to any 53 out via ${oif} keep-state
>
> # Allow NTP queries out in the world
> ${fwcmd} add pass udp from ${oip} to any 123 out via ${oif} keep-state
>
> ${fwcmd} add deny log all from any to any
>
>
>
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