Re: What exactly is ipfilter?

2004-01-26 Thread Erik Trulsson
On Thu, Dec 04, 2003 at 10:38:16PM -0700, Emmanuel Gravel wrote:
> I'm looking through rc.conf and the kernel config file for FreeBSD 4.9
> (recently downloaded it, my last upgrade was 4.5 so I was way behind,
> and this is a new install because my old firewall died). I'm used to
> using ipfw and natd for my firewall, but now I'm seeing ipfilter, ipnat
> and ipmon. I've done a google search on all of www.freebsd.org for
> ipfilter, but it only seems to show up in release notes, and the online
> handbook doesn't really talk about it. Since I haven't recompiled my new
> kernel, should I consider this instead of ipfw and natd? What's the
> difference, exactly?

ipfilter is just another firewall implementation, which you can use
instead of ipfw/natd if you wish.
The difference is mainly that it is different.  The configuration and
implementation is completely different, but the functionality is more
or less the same.
Use whichever one of ipfw/ipfilter that you wish, but if you already
are familiar with ipfw/natd you might as well stick with it, unless you
have some specific reason to switch.

Since ipfilter isn't FreeBSD specific, you should probably not confine
your web-searches for information on it to freebsd.org.

> 
> On a related note, I'm not sure what the usefulness of IPDIVERT is
> either, so I don't know if I should compile it in the kernel or not.

It is needed for natd to work, so if you are using natd you need
IPDIVERT in your kernel.



-- 

Erik Trulsson
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RE: What exactly is ipfilter?

2003-12-05 Thread fbsd_user
FBSD comes with two firewall applications built into the base
release. IPFW and IPFILTER. IPFW is an FBSD in-house project which
authored IPFW so the handbook leads the reader into thinking it's
the only firewall in FBSD. IPFW has just gone through an rewrite and
a bunch of code bloat was added in the form of new rule options
targeted at the professional FBSD user. It still contains the NATD
stateful bug and the stateless and simple stateful rule formats.
These rule formats do not provide the level of firewall security
necessary to protect your private network. I have used both
firewalls and have found that IPFILTER has cleaner stateful rule
format and in general is much easier to configure.  The nat process
is done out side of the firewall where by IPFW performs the NAT
process as subroutine called from within the filter rules.  Go with
IPFILTER you will be glade you did.


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Emmanuel
Gravel
Sent: Friday, December 05, 2003 12:38 AM
To: [EMAIL PROTECTED]
Subject: What exactly is ipfilter?

I'm looking through rc.conf and the kernel config file for FreeBSD
4.9
(recently downloaded it, my last upgrade was 4.5 so I was way
behind,
and this is a new install because my old firewall died). I'm used to
using ipfw and natd for my firewall, but now I'm seeing ipfilter,
ipnat
and ipmon. I've done a google search on all of www.freebsd.org for
ipfilter, but it only seems to show up in release notes, and the
online
handbook doesn't really talk about it. Since I haven't recompiled my
new
kernel, should I consider this instead of ipfw and natd? What's the
difference, exactly?

On a related note, I'm not sure what the usefulness of IPDIVERT is
either, so I don't know if I should compile it in the kernel or not.

Thanks!

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Re: What exactly is ipfilter?

2003-12-05 Thread Dwi Suharto
On Thu, 4 Dec 2003, Emmanuel Gravel wrote:
> I'm looking through rc.conf and the kernel config file for FreeBSD 4.9
> (recently downloaded it, my last upgrade was 4.5 so I was way behind,
> and this is a new install because my old firewall died). I'm used to
> using ipfw and natd for my firewall, but now I'm seeing ipfilter, ipnat
> and ipmon. I've done a google search on all of www.freebsd.org for
> ipfilter, but it only seems to show up in release notes, and the online
> handbook doesn't really talk about it. Since I haven't recompiled my new
> kernel, should I consider this instead of ipfw and natd? What's the
> difference, exactly?
>
> On a related note, I'm not sure what the usefulness of IPDIVERT is
> either, so I don't know if I should compile it in the kernel or not.

i'm currently using ipf and ipnat for firewall.

you can check this URL for ipf:
http://www.obfuscation.org/ipf/ipf-howto.html#TOC_5

---
Dwi Suharto

System Engineer and
Computer Network Technical Support
STMIK AKAKOM Yogyakarta
Phone: +62-274-486664 ext. 192
Mobile: +62-8562836982
http://get.bounceme.net/

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What exactly is ipfilter?

2003-12-04 Thread Emmanuel Gravel
I'm looking through rc.conf and the kernel config file for FreeBSD 4.9
(recently downloaded it, my last upgrade was 4.5 so I was way behind,
and this is a new install because my old firewall died). I'm used to
using ipfw and natd for my firewall, but now I'm seeing ipfilter, ipnat
and ipmon. I've done a google search on all of www.freebsd.org for
ipfilter, but it only seems to show up in release notes, and the online
handbook doesn't really talk about it. Since I haven't recompiled my new
kernel, should I consider this instead of ipfw and natd? What's the
difference, exactly?

On a related note, I'm not sure what the usefulness of IPDIVERT is
either, so I don't know if I should compile it in the kernel or not.

Thanks!

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