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Date:      Tue, 13 Mar 2001 11:27:54 +0100 (CET)
From:      Dan Larsson <dl@tyfon.net>
To:        <cjclark@alum.mit.edu>
Cc:        FreeBSD Questions List <questions@FreeBSD.ORG>
Subject:   Re: Strange traceroute issue
Message-ID:  <Pine.BSF.4.33.0103131126350.71577-100000@hq1.tyfon.net>
In-Reply-To: <20010308225855.T1367@cjc-desktop.users.reflexcom.com>

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On Thu, 8 Mar 2001, Crist J. Clark wrote:

| On Thu, Mar 08, 2001 at 07:24:52PM +0100, Dan Larsson wrote:
| > We have setup a firewall so that traceroutes can
| > be done from hosts on the inside. This works perfect
| > for all Microsoft based clients (WinNT) but failes
| > for all FreeBSD clients. What could I be missing here?
|
| Windows and UNIX-type OSes do traceroute (or tracert) differently.

Ok. What is the difference?

| > This is the fwrule:
| > ${fwcmd} add pass udp from any to any 33434-33523 out via ${oif}
|
| Do you have a corresponding rule to let UDP pass the inner interface?
| If you do a tcpdump on the external interface, do you see the UDP
| going out?

That was the problem. It has been corrected, thanks for the advice :)

|

Regards
+------
Dan Larsson      | Tel:   +46 8 550 120 21
Tyfon Svenska AB | Fax:   +46 8 550 120 02
GPG and PGP keys | finger dl@hq1.tyfon.net




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