Date: Fri, 21 Oct 2005 10:36:23 -0400 From: Daemon <daemon@foxchat.net> To: freebsd-ipfw@freebsd.org Cc: freebsd-ipfw@freebsd.org Subject: Re: ipfw firewall help Message-ID: <4358FCE7.5040803@foxchat.net> In-Reply-To: <4358899F.1090505@roamingsolutions.net> References: <435849B9.8040509@foxchat.net> <4358899F.1090505@roamingsolutions.net>
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Great!. Thanks. One possibly stupid question. What is the "Deny
Spoof"? Is that like;
# Stop spoofing of your internal network range
# ${fwcmd} add deny ip from ${iif} to any in via ${oif}
# Stop spoofing from inside your private ip range
# ${fwcmd} add deny ip from not ${iif} to any in via ${iif}
G Bryant wrote:
> Hi,
> I found my rules worked best in this order:
> (You will need to correct the syntax - just typed up the order for you
> quickly)
>
> Deny spoofed
> Allow localhost
> Allow all from any to any via $iif
> divert natd all from any to any in via $oif
> #insert bandwidth shaping rules
> skipto 5000 all from $iip to any out via $oif
> #allow all from any to me in via $oif # if you want to receive traffic
> from internet to this box. Your decision if you need it.
> deny all from any to any out
> allow all from any to $iip in via $oif
> #allow all from me to any out via $oif # traffic from this box out to
> the internet. Your decision if you need it.
> deny all from any to any in
> 5000 nat all from any to any out via $oif
> allow all from any to any out
>
> This is a very "open" set of rules - your choice.
> Hope this helps.
> Regards, Graham
>
>
> Daemon wrote:
>
>> I'm trying to build a firewall from scratch using man ipfw and what I
>> can find on the net. I'm doing bandwidth shaping and I'm not quite sure
>> where it goes as far as rule numbers. From what I can see, it matters
>> and I'd like to do it right. I'm using an OPEN firewall with NATD
>> because I'm on cable broadband with a static IP. Here is what I have.
>>
>> 00010 52 2446 pipe 1 ip from 172.16.140.0/24 to any xmit re0
>> 00020 0 0 pipe 2 ip from any to 172.16.140.0/24 recv re0
>> 00050 274 24955 divert 8668 ip from any to any via re0
>> 00100 50 5642 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
>> 65535 4658 547779 allow ip from any to any
>>
>> The actual rule set for the bandwidth shaping is:
>>
>> # Traffic Shaping.
>> # oif="re0" # ${oif} Public Interface.
>> # iif="re1" # ${iif} Internal nic.
>> # iip="172.16.140.0/24" # ${iip}
>>
>> ${fwcmd} add 10 pipe 1 all from ${iip} to any xmit ${oif}
>> ${fwcmd} pipe 1 config mask src-ip 0xffffff00 bw 35Kbits/s queue 40Kbytes
>>
>> ${fwcmd} add 20 pipe 2 all from any to ${iip} recv ${oif}
>> ${fwcmd} pipe 2 config mask dst-ip 0xffffff00 bw 4000Kbits/s queue
>> 40Kbytes
>>
>> I've found lots of stuff on "how" to set it up but I can't seem to find
>> anything on where the rules go. Any help would be greatly appreciated.
>>
>> Regards,
>>
>> Mark
>> _______________________________________________
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>>
>>
>>
>>
>
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