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Date:      Wed, 21 Aug 2002 20:11:36 +0400
From:      "Sergey Mokryshev" <mokr@mokr.net>
To:        <cjclark@alum.mit.edu>
Cc:        "Radko Keves" <rado@studnet.sk>, <questions@FreeBSD.ORG>, <current@FreeBSD.ORG>
Subject:   Re: question about ipl.ko
Message-ID:  <0ab501c2492d$bc90fe10$0f0010ac@office.tersys.ru>
References:  <20020816130147.GA39907@studnet.sk> <20020816193854.GC47465@blossom.cjclark.org> <062201c2475f$9f19ab40$0f0010ac@office.tersys.ru> <20020820181519.GA69240@blossom.cjclark.org>

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Hello, Crist!
You wrote to "Sergey Mokryshev" <mokr@mokr.net> on Tue, 20 Aug 2002
11:15:20 -0700:

[skipped]
 >> $ grep PFIL /usr/src/sys/i386/conf/AMBER options
 >> PFIL_HOOKS

 >> You need to include "options PFIL_HOOKS" in your kernel
 >> configuration to be able to use ipfilter as a loadable module.

 CJC> But what's the point? PFIL_HOOKS only used by IPFilter. If you
 CJC> are going to be recompiling a kernel, you might just as well
 CJC> compile in "options IPFILTER" and be done with it.

PFIL hooks is a generic kernel interface and can be used
by other programs that work with network.

Another point - you can upgrade ipfilter stuff without rebooting,
it is useful in situations where minimum downtime is possible.

PFIL_HOOKS does not add much functionality to the kernel and
I always turn this on on every box.

Sergey Mokryshev.


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