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Date:      Mon, 31 Jan 2000 19:31:16 +0200
From:      Ruslan Ermilov <ru@ucb.crimea.ua>
To:        John <papalia@udel.edu>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: NATD/Divert broken ?
Message-ID:  <20000131193116.A72155@relay.ucb.crimea.ua>
In-Reply-To: <4.1.20000131120328.009749c0@mail.udel.edu>; from John on Mon, Jan 31, 2000 at 12:14:11PM -0500
References:  <4.1.20000131120328.009749c0@mail.udel.edu>

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On Mon, Jan 31, 2000 at 12:14:11PM -0500, John wrote:
> Hey all,
> 
> I'm having a small problem with my NATD and my firewall.  Per the
> instructions in "The Complete FreeBSD", I added the firewall rule:
> 
> divert natd ip from any to any via fxp1
> 
> The problem is that this rule is causing partial problems on my loopback
> device (lo0).
> 
> What happens is that with the rule in place, for some connections within
> the box (which definitely go thru lo0), the connections fail.  If I remove
> that rule, then the connections within the box can be made, but then I lose
> all ability to host my internal 192.168. net.
> 
> I have done tcpdumps of both the successful and unsuccessful connections
> and have pasted them below.  If the actual tcpdump files would be useful, I
> can attach those to a subsequent email. 
> 
> Also, I'm currently running 3.3 and am suffering from NO other apparent
> problems with lo0 that I can tell.
> 
> tcpdumps are below.
> 
> Thanks in advance,
> John
> 

> ******
> Failed connection, with divert rule in place:
> ******
> 
> 12:01:10.744362 merlin.wondermutt.net.3482 > merlin.wondermutt.net.39536: S
> 1027967984:1027967984(0) win 16384 <mss 16344,nop,wscale 0,nop,no
> 
[...]
Can you show me the above in numerical form (with -n), with the output of
the following commands:

* ifconfig -au inet
* netstat -arn
* ipfw show

And how do you start natd?

-- 
Ruslan Ermilov		Sysadmin and DBA of the
ru@ucb.crimea.ua	United Commercial Bank,
ru@FreeBSD.org		FreeBSD committer,
+380.652.247.647	Simferopol, Ukraine

http://www.FreeBSD.org	The Power To Serve
http://www.oracle.com	Enabling The Information Age


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