Traceroute supporting ICMP ECHO

Clint Olsen clint at 0lsen.net
Wed May 12 12:29:22 PDT 2004


Hi:

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.

Is there anyone who has considered adding this capability to FreeBSD?

Thanks,

-Clint


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