Date: Fri, 28 Nov 2003 23:45:36 +0100 From: Alex de Kruijff <freebsd@akruijff.dds.nl> To: Khairil Yusof <kaeru@pd.jaring.my> Cc: questions@freebsd.org Subject: Re: ipfw pipes + firewall Message-ID: <20031128224536.GB815@dds.nl> In-Reply-To: <1070026625.16777.115.camel@wolverine.home.net> References: <1070026625.16777.115.camel@wolverine.home.net>
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On Fri, Nov 28, 2003 at 09:37:06PM +0800, Khairil Yusof wrote: > I've read the man pages, and tested it out, and just want to confirm > that what I"m doing is right and that I didn't miss anything. > > Disable one_pass so that packets after matching pipe rule will continue > on to other rules. Without this, packets matching pipes are not not > applied again against firewall rules. > > net.inet.ip.fw.one_pass: 0 > > I then put the pipe rules before any firewall rules so that anything > going in and out (in this case) go through the pipes first. They are > then matched by normal firewall rules. > > 00100 83 11350 pipe 1 ip from any to any out > 00200 93 11266 pipe 2 ip from any to any in > 00300 0 0 check-state > 00400 0 0 deny tcp from any to any established > 01400 103 14855 allow tcp from any to me dst-port 22 in setup keep-state > ... more firewall rules which are being matched > > From what I can see the pipe rules are being matched. I tested bandwidth > controls, and they work. And I also could not access ports which I did > have a dynamic rule for (as in 01400). I find your 400 rule very strage. Rule 400 souldn't apply because they are passed by 300 (this one doens't have a counter :( ). For rule 1400 the dst-port is wronly placed. Port are (or can be) given afther the ip without any marker. I would replace 1400 with: allow tcp from any to me 22 in allow tcp from me 22 to any out No need to have dynamic rules here so place it before 300 -- Alex Articles based on solutions that I use: http://www.kruijff.org/alex/index.php?dir=docs/FreeBSD/
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