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OpenBSD Packet Filter Ported To NetBSD, FreeBSD

Posted by timothy on from the undetectable-natting dept.

honold writes "just read this on deadly.org (from Pyun YongHyeon): "Hello there. I have ported pf to FreeBSD 5.0 Currently it works well, though many nice features of pf not tested. I have ported to make FreeBSD users know there is an another excellent stateful packet filter with BSD license. URL is the following. ftp://ftp.kr.freebsd.org/pub/FreeBSD-kr/misc/pf_fr eebsd_0.3.tar.bz2 Thanks." netbsd has a port as well Where are you, Linux?"

1 of 48 comments (clear)

  1. Re:Where are you, Linux? by josepha48 · · Score: 4, Interesting
    Then use netfilter.. its pretty nice... I'd agree it does change each release. But you can also use the old way still. 2.4.x has all 3 in it so you can pick which one you want to use. So while yes it has changed, it also has more options now (another point of view).

    Also both FreeBSD and NetBSD have had for a while ipfilter, which is able to 'keep state'. So they already had stateful filtering. At least that's what I thought the 'keep state' keyword in ipf was supposed to do. In FreeBSD 4.? they introduced ipfirewall or ipfw. FreeBSD 5.0 has ipfw2 which does a great job at keeping state. Just use ipfw -d show and you see what is going through your firewall in the state table. Actual ip:port to ip:port listing. I wish it had something like ipfilters ipfstat -t command.

    FreeBSD now has 3 choices as far as stateful packet filtering go, ipfilter, packet filter and ipfirewall. What really needs to be done is metrics on all these to show which is actually better under FreeBSD. Metrics that show performane as well as features. Also ease of understanding.

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