Date: Wed, 12 May 2004 12:33:20 -0700 From: Mike Hogsett <hogsett@csl.sri.com> To: Clint Olsen <clint@0lsen.net> Cc: questions@freebsd.org Subject: Re: Traceroute supporting ICMP ECHO Message-ID: <200405121933.i4CJXKOB022965@beast.csl.sri.com> In-Reply-To: Message from Clint Olsen <clint@0lsen.net> of "Wed, 12 May 2004 12:29:19 PDT." <20040512192918.GA69895@0lsen.net>
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> I'm using 4.7p1 here, and I've had all sorts of fun on occasion with
> traceroute and my various firewall/routers. The default traceroute will
> not work since UDP traffic is apparently blocked on the return. Opening =
up
> port ranges on my router just doesn't seem right. However, Linux
> traceroute has a -I option (I think Windows tracert uses ICMP ECHO by
> default) which allows it to work through a home firewall router. The
> FreeBSD port for mtr also works.
>=20
> Is there anyone who has considered adding this capability to FreeBSD?
I think its already there. ( 4.9-RELEASE-p3 )
=46rom traceoute(8)
-P Send packets of specified IP protocol. The currently suppor=
ted
protocols are: UDP, TCP, GRE and ICMP. Other protocols may a=
lso
be specified (either by name or by number), though tracero=
ute
does not implement any special knowledge of their packet f=
or-
mats. This option is useful for determining which router alon=
g a
path may be blocking packets based on IP protocol number. =
But
see BUGS below.
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